CI job to create cargo-generate template branch

- Last part of job "Commit and Push" provided by Gemni and edited by me.
- Verified email address based on https://github.com/actions/checkout#push-a-commit-using-the-built-in-token

Author: c-git

.github/workflows/cargo-gen.yml

@@ -0,0 +1,37 @@
+name: Github Pages
+
+on:
+  push:
+    branches:
+      - main
+      - create-cargo-generate-template # For testing
+
+permissions:
+  contents: write # for committing to cargo-gen branch.
+
+jobs:
+  build-github-pages:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4 # repo checkout
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: nightly
+      - name: Replace values with placeholders
+        run: ./fill_template.rs
+      - name: Commit and Push
+        run: |
+          # 1. Configure Git
+          git config --global user.name "github-actions[bot]"
+          git config --global user.email "41898282+github-actions[bot]@users.noreply.github.com"
+
+          # 2. Create/Switch to the target branch
+          git checkout -b cargo-gen
+
+          # 3. Add and commit
+          git add .
+          git commit -m "Replace values with template values"
+
+          # 4. Push to the remote
+          git push origin cargo-gen --force