Replace individual GitHub Actions with a single deploy action

This commit replaces the separate `generate-json.yml` and `generate-rss.yml` workflows with a single `deploy.yml` workflow.

This new workflow will build the site and deploy it to the `gh-pages` branch, which will prevent the `main` branch from being littered with automated commits.

.github/workflows/deploy.yml

@@ -0,0 +1,36 @@
+name: Deploy to GitHub Pages
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: '20'
+
+    - name: Install dependencies
+      run: npm install
+
+    - name: Generate JSON and RSS
+      run: |
+        node generate-json.js
+        node generate-rss.js
+
+    - name: Deploy to GitHub Pages
+      uses: peaceiris/actions-gh-pages@v4
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        publish_dir: .
+        publish_branch: gh-pages

.github/workflows/generate-json.yml

@@ -1,37 +0,0 @@
-name: Generate JSON file
-on:
-  push:
-    paths:
-      - 'data.yml'
-    branches:
-      - main
-  workflow_dispatch:
-
-jobs:
-  generate-json:
-    runs-on: ubuntu-latest
-    permissions:
-      contents: write
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-      
-      - name: Setup Node.js
-        uses: actions/setup-node@v3
-        with:
-          node-version: '18'
-      
-      - name: Install dependencies
-        run: npm install js-yaml
-      
-      - name: Generate JSON file
-        run: node generate-json.js
-      
-      - name: Commit and push if changed
-        run: |
-          git config --local user.email "action@github.com"
-          git config --local user.name "GitHub Action"
-          git add api.json
-          git diff --quiet && git diff --staged --quiet || git commit -m "Update JSON Data File"
-          git pull --rebase
-          git push

.github/workflows/generate-rss.yml

@@ -1,37 +0,0 @@
-name: Generate RSS Feed
-on:
-  push:
-    paths:
-      - 'data.yml'
-    branches:
-      - main
-  workflow_dispatch:
-
-jobs:
-  generate-rss:
-    runs-on: ubuntu-latest
-    permissions:
-      contents: write
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-      
-      - name: Setup Node.js
-        uses: actions/setup-node@v3
-        with:
-          node-version: '18'
-      
-      - name: Install dependencies
-        run: npm install js-yaml
-      
-      - name: Generate RSS feed
-        run: node generate-rss.js
-      
-      - name: Commit and push if changed
-        run: |
-          git config --local user.email "action@github.com"
-          git config --local user.name "GitHub Action"
-          git add feed.xml
-          git diff --quiet && git diff --staged --quiet || git commit -m "Update RSS feed"
-          git pull --rebase
-          git push