chore: add community standards (CoC, contributing, security, templates)

Adds the seven files needed to pass the GitHub Community Standards checklist:

- CODE_OF_CONDUCT.md (Contributor Covenant 2.1)
- CONTRIBUTING.md (scope, dev setup, tests, PR rules; points users at
  feder-cr/firefox-stealth for C++/spoofing issues)
- SECURITY.md (private vuln reporting via GH advisories or email,
  out-of-scope items redirected to firefox-stealth / Mozilla)
- .github/ISSUE_TEMPLATE/bug_report.yml
- .github/ISSUE_TEMPLATE/feature_request.yml
- .github/ISSUE_TEMPLATE/config.yml (disables blank issues, links to
  security advisories, firefox-stealth, and discussions)
- .github/PULL_REQUEST_TEMPLATE.md

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,79 @@
+name: Bug report
+description: Report a bug in the invisible_playwright Python wrapper
+title: "[bug] "
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to file a bug report.
+
+        Before continuing, please:
+        - Search [existing issues](https://github.com/feder-cr/invisible_playwright/issues?q=is%3Aissue) to avoid duplicates.
+        - If the bug is in the **patched Firefox itself** (canvas/WebGL/audio/font spoofing, a detector flagging the browser), open it at [feder-cr/firefox-stealth](https://github.com/feder-cr/firefox-stealth/issues) instead.
+        - **Do not** report security vulnerabilities here — follow [SECURITY.md](https://github.com/feder-cr/invisible_playwright/blob/main/SECURITY.md).
+  - type: input
+    id: version
+    attributes:
+      label: invisible_playwright version
+      description: Output of `invisible_playwright version`
+      placeholder: "0.1.0 (binary 150.0.1)"
+    validations:
+      required: true
+  - type: dropdown
+    id: os
+    attributes:
+      label: Operating system
+      options:
+        - Windows x86_64
+        - Linux x86_64
+        - Other (please specify in description)
+    validations:
+      required: true
+  - type: input
+    id: python
+    attributes:
+      label: Python version
+      placeholder: "3.11.7"
+    validations:
+      required: true
+  - type: textarea
+    id: repro
+    attributes:
+      label: Minimal reproduction
+      description: A small, self-contained code snippet that triggers the bug. Strip out anything unrelated.
+      render: python
+    validations:
+      required: true
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected behavior
+    validations:
+      required: true
+  - type: textarea
+    id: actual
+    attributes:
+      label: Actual behavior
+      description: Include the full error message and traceback if any.
+    validations:
+      required: true
+  - type: textarea
+    id: logs
+    attributes:
+      label: Logs / additional context
+      description: Browser console output, environment variables, proxy config (redact credentials), etc.
+      render: text
+    validations:
+      required: false
+  - type: checkboxes
+    id: confirm
+    attributes:
+      label: Confirmations
+      options:
+        - label: I have searched existing issues and this bug has not been reported.
+          required: true
+        - label: I am on the latest release.
+          required: true
+        - label: I have removed any credentials, proxy passwords, or sensitive data from logs.
+          required: true

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,11 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Security vulnerability
+    url: https://github.com/feder-cr/invisible_playwright/security/advisories/new
+    about: Report a security issue privately. Do NOT open a public issue.
+  - name: Bug in the patched Firefox itself (canvas / WebGL / fonts / WebRTC / etc.)
+    url: https://github.com/feder-cr/firefox-stealth/issues
+    about: Spoofing/fingerprint bugs belong in the firefox-stealth repo.
+  - name: Question or general discussion
+    url: https://github.com/feder-cr/invisible_playwright/discussions
+    about: For usage questions, ideas, and chat. Bugs and features still go in issues.

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,47 @@
+name: Feature request
+description: Suggest a new feature or improvement
+title: "[feature] "
+labels: ["enhancement"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for the suggestion! Please check that:
+        - Your idea is **in scope** for this repo (the Python wrapper, sampler, CLI, packaging).
+        - Changes to the patched Firefox C++ source belong at [feder-cr/firefox-stealth](https://github.com/feder-cr/firefox-stealth) instead.
+        - You have searched [existing issues](https://github.com/feder-cr/invisible_playwright/issues?q=is%3Aissue) for similar requests.
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem
+      description: What problem does this solve? What can't you currently do, or what is awkward today?
+    validations:
+      required: true
+  - type: textarea
+    id: proposal
+    attributes:
+      label: Proposed solution
+      description: How would the feature work? API sketches, CLI examples, or pseudocode welcome.
+    validations:
+      required: true
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives considered
+      description: Other approaches you thought about and why they fall short.
+    validations:
+      required: false
+  - type: textarea
+    id: context
+    attributes:
+      label: Additional context
+      description: Links to related issues, prior art in other libraries, screenshots, etc.
+    validations:
+      required: false
+  - type: checkboxes
+    id: contribute
+    attributes:
+      label: Are you willing to contribute?
+      options:
+        - label: I'd be willing to open a PR for this if accepted.
+          required: false

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,40 @@
+<!--
+Thanks for your contribution! Please fill in the sections below.
+PRs that don't follow this template may be asked for revision before review.
+-->
+
+## Summary
+
+<!-- One or two sentences: what does this PR change and why? -->
+
+## Type of change
+
+<!-- Tick all that apply -->
+
+- [ ] Bug fix (non-breaking change that fixes an issue)
+- [ ] New feature (non-breaking change that adds functionality)
+- [ ] Breaking change (fix or feature that changes existing behavior)
+- [ ] Documentation only
+- [ ] Tests / CI / tooling
+
+## Related issues
+
+<!-- Link any related issues, e.g. "Closes #123", "Refs #456" -->
+
+## How was this tested?
+
+<!--
+Describe what you ran:
+- `pytest` (default, unit + integration)
+- `pytest -m e2e` (against the patched binary)
+- Manual repro steps, screenshots, etc.
+-->
+
+## Checklist
+
+- [ ] I have read [CONTRIBUTING.md](../CONTRIBUTING.md).
+- [ ] My commits follow [Conventional Commits](https://www.conventionalcommits.org/).
+- [ ] I added or updated tests covering the change.
+- [ ] `pytest` passes locally.
+- [ ] I updated `README.md` / `docs/` if user-visible behavior changed.
+- [ ] My change is in scope for this repo (Python wrapper / sampler / CLI / packaging — not the patched Firefox C++ source).