ci: add job to mirror repo to Codeberg

- [ci] Add new job `mirror_to_codeberg` (.github/workflows/repo-mirror.yml:52)
- [ci] Set `runs-on` to `ubuntu-latest` (repo-mirror.yml:53)
- [ci] Add step using `actions/checkout@v3` with `fetch-depth: 0` (repo-mirror.yml:55-57)
- [ci] Add `Configure Git` step with user name and email (repo-mirror.yml:58-61)
- [ci] Add `Mirror to Codeberg` step using `SSH_PRIVATE_KEY` and `TARGET_URL` secrets (repo-mirror.yml:62-65)
- [ci] Create `~/.ssh` directory and write `SSH_PRIVATE_KEY` (repo-mirror.yml:66-67)
- [ci] Set 600 permissions for `~/.ssh/id_rsa` (repo-mirror.yml:68)
- [ci] Add `codeberg.org` host key to `known_hosts` (repo-mirror.yml:69)
- [ci] Execute `git push --force` command (repo-mirror.yml:71)
- [style] Add newline at end of file (repo-mirror.yml:50,71)

Author: nazdridoy

.github/workflows/repo-mirror.yml

@@ -50,4 +50,26 @@ jobs:
           chmod 600 ~/.ssh/id_rsa
           ssh-keyscan -t rsa $(echo ${TARGET_URL} | cut -d '@' -f 2 | cut -d ':' -f 1) >> ~/.ssh/known_hosts
           # Push local branches and tags, excluding remote refs
-          git push --force ${TARGET_URL} 'refs/heads/*:refs/heads/*' 'refs/tags/*:refs/tags/*' 
+          git push --force ${TARGET_URL} 'refs/heads/*:refs/heads/*' 'refs/tags/*:refs/tags/*' 
+
+  mirror_to_codeberg:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Configure Git
+        run: |
+          git config --global user.name "GitHub Actions"
+          git config --global user.email "[email protected]"
+      - name: Mirror to Codeberg
+        env:
+          SSH_PRIVATE_KEY: ${{ secrets.CODEBERG_SSH_PRIVATE_KEY }}
+          TARGET_URL: ${{ secrets.CODEBERG_REPO_URL }}
+        run: |
+          mkdir -p ~/.ssh
+          echo "${SSH_PRIVATE_KEY}" > ~/.ssh/id_rsa
+          chmod 600 ~/.ssh/id_rsa
+          ssh-keyscan -t rsa codeberg.org >> ~/.ssh/known_hosts
+          # Push local branches and tags, excluding remote refs
+          git push --force ${TARGET_URL} 'refs/heads/*:refs/heads/*' 'refs/tags/*:refs/tags/*'