ci: add workflow to build dist branch with resolved deps

Creates a `dist` branch with packed packages where `catalog:*` and
`workspace:*` refs are resolved to actual versions. This enables
installing from git with pnpm's subdirectory syntax:

  "@slidev/client": "git+https://github.com/Open-Athena/slidev.git?path=/packages/client#dist"

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: ryan-williams

.github/workflows/build-dist.yml

@@ -0,0 +1,132 @@
+name: Build dist branch
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+    inputs:
+      source_ref:
+        description: 'Source ref to build from (default: main)'
+        required: false
+        default: 'main'
+
+jobs:
+  build-dist:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.source_ref || 'main' }}
+          fetch-depth: 0
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'pnpm'
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Get source commit info
+        id: source
+        run: |
+          echo "sha=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT
+          echo "sha_short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
+          echo "message=$(git log -1 --pretty=%s)" >> $GITHUB_OUTPUT
+
+      - name: Pack packages
+        run: |
+          # Pack each package (resolves catalog: and workspace: refs)
+          for pkg in client parser slidev types; do
+            echo "Packing @slidev/$pkg..."
+            cd packages/$pkg
+            pnpm pack
+            cd ../..
+          done
+
+      - name: Prepare dist branch content
+        run: |
+          mkdir -p dist-content/packages
+
+          # Extract each packed tarball to dist structure
+          for pkg in client parser slidev types; do
+            echo "Extracting $pkg..."
+            mkdir -p dist-content/packages/$pkg
+            tar -xzf packages/$pkg/*.tgz -C dist-content/packages/$pkg --strip-components=1
+          done
+
+          # Create root package.json for the dist branch
+          cat > dist-content/package.json << 'EOF'
+          {
+            "name": "@open-athena/slidev-dist",
+            "private": true,
+            "description": "Dist branch with resolved dependencies for Open-Athena/slidev fork",
+            "repository": {
+              "type": "git",
+              "url": "https://github.com/Open-Athena/slidev"
+            }
+          }
+          EOF
+
+          # Add README
+          cat > dist-content/README.md << EOF
+          # Slidev Dist Branch
+
+          This branch contains packed versions of Slidev packages with resolved dependencies.
+
+          **Source commit:** ${{ steps.source.outputs.sha }}
+          **Built from:** ${{ inputs.source_ref || 'main' }}
+
+          ## Usage
+
+          In your \`package.json\`, use pnpm's git subdirectory syntax:
+
+          \`\`\`json
+          {
+            "dependencies": {
+              "@slidev/cli": "git+https://github.com/Open-Athena/slidev.git?path=/packages/slidev#dist"
+            },
+            "pnpm": {
+              "overrides": {
+                "@slidev/client": "git+https://github.com/Open-Athena/slidev.git?path=/packages/client#dist",
+                "@slidev/parser": "git+https://github.com/Open-Athena/slidev.git?path=/packages/parser#dist",
+                "@slidev/types": "git+https://github.com/Open-Athena/slidev.git?path=/packages/types#dist"
+              }
+            }
+          }
+          \`\`\`
+
+          Or pin to a specific commit:
+
+          \`\`\`json
+          "@slidev/client": "git+https://github.com/Open-Athena/slidev.git?path=/packages/client#${{ steps.source.outputs.sha }}"
+          \`\`\`
+          EOF
+
+      - name: Push to dist branch
+        run: |
+          cd dist-content
+
+          git init
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+
+          git add -A
+          git commit -m "dist: ${{ steps.source.outputs.message }}
+
+          Source: ${{ steps.source.outputs.sha }}
+
+          🤖 Generated with GitHub Actions"
+
+          # Force push to dist branch
+          git push --force "https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git" HEAD:dist
+
+          echo "✅ Pushed to dist branch"
+          echo ""
+          echo "Install with:"
+          echo '  "@slidev/client": "git+https://github.com/${{ github.repository }}.git?path=/packages/client#dist"'