ci(clang-format): directly do the clang-format instead of error (hypr…

…wm#8955)

Will suggest a clang-format fix on every MR that violates it.

.github/workflows/ci.yaml

@@ -126,3 +126,27 @@ jobs:
 
       - name: clang-format check
         run: ninja -C build clang-format-check
+
+      - name: clang-format apply
+        if: ${{ failure() && github.event_name == 'pull_request' }}
+        run: ninja -C build clang-format
+
+      - name: Create patch
+        if: ${{ failure() && github.event_name == 'pull_request' }}
+        run: |
+          echo 'Please fix the formatting issues by running [`clang-format`](https://wiki.hyprland.org/Contributing-and-Debugging/PR-Guidelines/#code-style), or directly apply this patch:' > clang-format.patch
+          echo '<details>' >> clang-format.patch
+          echo '<summary>clang-format.patch</summary>' >> clang-format.patch
+          echo >> clang-format.patch
+          echo '```diff' >> clang-format.patch
+          git diff >> clang-format.patch
+          echo '```' >> clang-format.patch
+          echo >> clang-format.patch
+          echo '</details>' >> clang-format.patch
+
+      - name: Comment patch
+        if: ${{ failure() && github.event_name == 'pull_request' }}
+        uses: mshick/add-pr-comment@v2
+        with:
+          message-path: |
+            clang-format.patch