Towards better release procedure

- Prepare release commit (CHANGELOG), triple-check and push.
- Wait for CI to finish.
- Tag locally and push.
- Tadaaa!

.github/workflows/release.yml

@@ -0,0 +1,36 @@
+name: Create Release
+
+on:
+  push:
+    tags: [ 'v*' ]
+
+jobs:
+  release:
+    # Avoid forks to perform this job.
+    if: github.repository_owner == 'stronk7'
+    name: Create Release
+    runs-on: ubuntu-22.04
+
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+
+      - name: Get version from tag
+        id: tag-name
+        run: |
+          echo "version=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT
+
+      - name: Extract release notes from changelog
+        id: extract-release-notes
+        uses: mindsers/changelog-reader-action@v2
+        with:
+          path: ./CHANGELOG.md
+          version: ${{ steps.tag-name.version }}
+
+      - name: Create Release
+        uses: ncipollo/release-action@v1
+        with:
+          body: |
+            ${{ steps.extract-release-notes.outputs.changes }}
+            #
+            Take a look at the [CHANGELOG](https://github.com/moodlehq/moodle-cs/blob/main/CHANGELOG.md) for details about other releases.