Add GitHub Pages Helm repository distribution (#686)

GHCR OCI packages cannot be made public through any available mechanism:
- Package doesn't appear in user/repo package lists
- API endpoints return 404
- Workflow tokens lack package visibility permissions
- Manual UI shows no packages to configure
- OCI annotations don't link package to repository

Implementing GitHub Pages Helm repo as canonical distribution method:
- Uses chart-releaser-action to publish to gh-pages branch
- Provides standard 'helm repo add' workflow without authentication
- Maintains OCI push for future use if GHCR resolves visibility issues

Resolves #686

.github/workflows/helm-pages.yml

@@ -0,0 +1,52 @@
+name: Release Helm Chart to GitHub Pages
+
+on:
+  release:
+    types: [published]
+  workflow_dispatch:
+    inputs:
+      chart_version:
+        description: "Chart version (e.g., 4.28.0)"
+        required: true
+
+permissions:
+  contents: write
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Configure Git
+        run: |
+          git config user.name "$GITHUB_ACTOR"
+          git config user.email "$GITHUB_ACTOR@users.noreply.github.com"
+
+      - name: Install Helm
+        uses: azure/setup-helm@v4
+        with:
+          version: v3.15.2
+
+      - name: Determine chart version
+        id: version
+        run: |
+          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
+            VERSION="${{ inputs.chart_version }}"
+          else
+            VERSION="${{ github.event.release.tag_name }}"
+            VERSION="${VERSION#v}"
+          fi
+          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
+
+      - name: Run chart-releaser
+        uses: helm/chart-releaser-action@v1.6.0
+        with:
+          charts_dir: deploy/helm
+          config: cr.yaml
+        env:
+          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+          CR_RELEASE_NAME_TEMPLATE: "{{ .Version }}"

cr.yaml

@@ -0,0 +1,3 @@
+owner: rcourtman
+git-repo: Pulse
+charts-repo-url: https://rcourtman.github.io/Pulse