feat: initialize Link2Pay documentation with VitePress

- Set up VitePress framework with custom theme
- Add comprehensive documentation structure
  - Getting Started guides (introduction, why-link2pay, quick-start)
  - Core concepts and architecture documentation
  - API reference with endpoint documentation
  - SDK documentation structure
- Configure deployment for Vercel and GitHub Pages
- Add contribution guidelines
- Set up GitHub Actions workflow
- Include custom styling matching Link2Pay brand

Author: carlos-israelj

.github/workflows/deploy.yml

@@ -0,0 +1,62 @@
+name: Deploy Documentation
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build documentation
+        run: npm run docs:build
+
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: docs-dist
+          path: docs/.vitepress/dist
+
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/main'
+
+    permissions:
+      contents: write
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Download build artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: docs-dist
+          path: docs/.vitepress/dist
+
+      - name: Deploy to GitHub Pages
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: docs/.vitepress/dist
+          cname: docs.link2pay.dev

.gitignore

@@ -0,0 +1,34 @@
+# Dependencies
+node_modules/
+package-lock.json
+yarn.lock
+pnpm-lock.yaml
+
+# Build output
+docs/.vitepress/dist
+docs/.vitepress/cache
+.temp/
+
+# IDE
+.vscode/*
+!.vscode/extensions.json
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Environment
+.env
+.env.local
+.env.*.local
+
+# Logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*