docs: Add mdBook documentation framework (#63)

Author: ammario

.github/workflows/docs.yml

@@ -0,0 +1,62 @@
+name: Deploy Documentation
+
+on:
+  push:
+    branches:
+      - main
+      - docs  # Also deploy from docs branch for testing
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        
+      - name: Setup mdBook
+        uses: peaceiris/actions-mdbook@v2
+        with:
+          mdbook-version: 'latest'
+      
+      - name: Install mdbook-mermaid
+        run: |
+          VERSION=$(curl -s https://api.github.com/repos/badboy/mdbook-mermaid/releases/latest | grep tag_name | cut -d '"' -f 4)
+          curl -sSL "https://github.com/badboy/mdbook-mermaid/releases/download/${VERSION}/mdbook-mermaid-${VERSION}-x86_64-unknown-linux-gnu.tar.gz" | tar -xz
+          sudo mv mdbook-mermaid /usr/local/bin/
+          mdbook-mermaid install .
+      
+      - name: Install mdbook-linkcheck
+        run: |
+          curl -sSL https://github.com/Michael-F-Bryan/mdbook-linkcheck/releases/latest/download/mdbook-linkcheck.x86_64-unknown-linux-gnu.zip -o linkcheck.zip
+          unzip -q -o linkcheck.zip
+          chmod +x mdbook-linkcheck
+          sudo mv mdbook-linkcheck /usr/local/bin/
+          
+      - name: Build documentation
+        run: mdbook build
+        
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: ./book/html
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

.gitignore

@@ -2,4 +2,7 @@ target/
 
 # Local Claude Code instructions (not committed to repo)
 CLAUDE.local.md
-artifacts/
+artifacts/
+book
+test-build
+mermaid*.js