docs: Add comprehensive VitePress documentation (#14)

* docs: Add comprehensive VitePress documentation

Create complete documentation site for rhdh-e2e-test-utils using VitePress:

- Guide section: installation, quick-start, core concepts, deployment, helpers, page objects, utilities, and configuration
- API reference: detailed method signatures and types for all exports
- Tutorials: step-by-step guides for common use cases
- Examples: copy-paste ready code examples

Additional features:
- GitHub Actions workflow for automatic deployment to GitHub Pages
- Standalone docs package with its own package.json and yarn.lock
- Reusable snippets to reduce duplication
- CLAUDE.md guide for documentation maintenance

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* fix CI yarn install

* fix CI yarn check

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: subhashkhileri

.github/workflows/deploy-docs.yml

@@ -0,0 +1,61 @@
+name: Deploy Documentation
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'docs/**'
+      - '.github/workflows/deploy-docs.yml'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: docs
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
+
+      - name: Install dependencies
+        run: yarn install
+
+      - name: Build documentation
+        run: yarn build
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: docs/.vitepress/dist
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

.gitignore

@@ -53,6 +53,10 @@ build/
 *.tsbuildinfo
 dist/
 
+# VitePress
+docs/.vitepress/cache/
+docs/.vitepress/dist/
+
 # Coverage
 coverage/
 .nyc_output/