docs: add workflow examples

examples/mcp-web-scraping/README.md

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+# MCP Web Scraping
+
+Use webclaw as a local MCP server so Claude Code, Claude Desktop, Cursor, Windsurf, OpenCode, Codex CLI, or another MCP client can fetch clean web context.
+
+## Install
+
+```bash
+npx create-webclaw
+```
+
+The installer detects supported MCP clients and can write the config for you.
+
+## Manual Config
+
+```json
+{
+  "mcpServers": {
+    "webclaw": {
+      "command": "~/.webclaw/webclaw-mcp",
+      "env": {
+        "WEBCLAW_API_KEY": "wc_your_key"
+      }
+    }
+  }
+}
+```
+
+`WEBCLAW_API_KEY` is optional for local extraction. Add it when you want cloud fallback for protected sites, JS rendering, hosted search, or hosted research.
+
+## Example Prompts
+
+```text
+Scrape https://docs.rs/tokio and summarize the parts about task spawning.
+```
+
+```text
+Crawl https://docs.example.com up to depth 2 and return the pages most relevant to authentication.
+```
+
+```text
+Extract the pricing tiers from https://example.com/pricing as JSON with fields name, price, limits, and features.
+```
+
+The MCP server exposes tools for scrape, crawl, map, batch, extract, summarize, diff, brand, research, search, and vertical extractors.