demo(vercel-ai-sdk): add CI workflows and env template

demos/use_cases/vercel-ai-sdk/.env.example

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+# Generate a random secret: https://generate-secret.vercel.app/32 or `openssl rand -base64 32`
+AUTH_SECRET=****
+
+# The following keys below are automatically created and
+# added to your environment when you deploy on Vercel
+
+# Instructions to create an AI Gateway API key here: https://vercel.com/ai-gateway
+# API key required for non-Vercel deployments
+# For Vercel deployments, OIDC tokens are used automatically
+# https://vercel.com/ai-gateway
+AI_GATEWAY_API_KEY=****
+
+
+# Instructions to create a Vercel Blob Store here: https://vercel.com/docs/vercel-blob
+BLOB_READ_WRITE_TOKEN=****
+
+# Instructions to create a PostgreSQL database here: https://vercel.com/docs/postgres
+POSTGRES_URL=****
+
+
+# Instructions to create a Redis store here:
+# https://vercel.com/docs/redis
+REDIS_URL=****

demos/use_cases/vercel-ai-sdk/.github/workflows/lint.yml

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+name: Lint
+on:
+  push:
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        node-version: [20]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 9.12.3
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: "pnpm"
+      - name: Install dependencies
+        run: pnpm install
+      - name: Run lint
+        run: pnpm lint

demos/use_cases/vercel-ai-sdk/.github/workflows/playwright.yml

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+name: Playwright Tests
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+    branches: [main, master]
+
+jobs:
+  test:
+    timeout-minutes: 30
+    runs-on: ubuntu-latest
+    env:
+      AUTH_SECRET: ${{ secrets.AUTH_SECRET }}
+      POSTGRES_URL: ${{ secrets.POSTGRES_URL }}
+      BLOB_READ_WRITE_TOKEN: ${{ secrets.BLOB_READ_WRITE_TOKEN }}
+      REDIS_URL: ${{ secrets.REDIS_URL }}
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: lts/*
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@v2
+        with:
+          version: latest
+          run_install: false
+
+      - name: Get pnpm store directory
+        id: pnpm-cache
+        shell: bash
+        run: |
+          echo "STORE_PATH=$(pnpm store path)" >> $GITHUB_OUTPUT
+
+      - uses: actions/cache@v3
+        with:
+          path: ${{ steps.pnpm-cache.outputs.STORE_PATH }}
+          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-pnpm-store-
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: lts/*
+          cache: "pnpm"
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Cache Playwright browsers
+        uses: actions/cache@v3
+        id: playwright-cache
+        with:
+          path: ~/.cache/ms-playwright
+          key: ${{ runner.os }}-playwright-${{ hashFiles('**/pnpm-lock.yaml') }}
+
+      - name: Install Playwright Browsers
+        if: steps.playwright-cache.outputs.cache-hit != 'true'
+        run: pnpm exec playwright install --with-deps chromium
+
+      - name: Run Playwright tests
+        run: pnpm test
+
+      - uses: actions/upload-artifact@v4
+        if: always() && !cancelled()
+        with:
+          name: playwright-report
+          path: playwright-report/
+          retention-days: 7