feat: add semantic-release for automated versioning

- Replaces manual tag-based releases with conventional commits
- Auto-generates CHANGELOG.md from commit messages
- Auto-bumps version based on commit type (feat→minor, fix→patch)
- Creates GitHub releases automatically on push to main

Commit prefixes that trigger releases:
- feat: → minor version bump (1.x.0)
- fix: → patch version bump (1.0.x)
- BREAKING CHANGE: → major version bump (x.0.0)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: wrsmith108

.github/workflows/release.yml

@@ -2,31 +2,32 @@ name: Release
 
 on:
   push:
-    tags:
-      - 'v*'
+    branches: [main]
 
 permissions:
   contents: write
+  issues: write
+  pull-requests: write
 
 jobs:
   release:
     runs-on: ubuntu-latest
+    # Skip if commit message contains [skip ci]
+    if: "!contains(github.event.head_commit.message, '[skip ci]')"
     steps:
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          persist-credentials: false
 
-      - name: Extract release notes
-        id: notes
-        run: |
-          VERSION=${GITHUB_REF#refs/tags/v}
-          # Extract section for this version from CHANGELOG.md
-          awk "/^## \[${VERSION}\]/{flag=1; next} /^## \[/{flag=0} flag" CHANGELOG.md > notes.md
-          # If no notes found, create a placeholder
-          if [ ! -s notes.md ]; then
-            echo "Release ${VERSION}" > notes.md
-          fi
-
-      - name: Create Release
-        uses: softprops/action-gh-release@v1
+      - uses: actions/setup-node@v4
         with:
-          body_path: notes.md
-          generate_release_notes: false
+          node-version: '20'
+          cache: 'npm'
+
+      - run: npm ci
+
+      - name: Release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: npx semantic-release