ci: Add release-please and npm-publish workflows with OIDC

- release-please creates releases on push to master/main
- npm-publish uses Trusted Publisher (OIDC) for secure publishing
- Includes provenance for supply chain security

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

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

Author: wheattoast11

.github/workflows/npm-publish.yml

@@ -0,0 +1,27 @@
+name: Publish to npm
+
+on:
+  release:
+    types: [published]
+
+permissions:
+  contents: read
+  id-token: write
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    environment: npm-publish
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          registry-url: 'https://registry.npmjs.org'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Publish to npm with provenance
+        run: npm publish --access public --provenance

.github/workflows/release-please.yml

@@ -0,0 +1,23 @@
+name: Release Please
+
+on:
+  push:
+    branches:
+      - master
+      - main
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    outputs:
+      release_created: ${{ steps.release.outputs.release_created }}
+      tag_name: ${{ steps.release.outputs.tag_name }}
+    steps:
+      - uses: googleapis/release-please-action@v4
+        id: release
+        with:
+          release-type: node