feat: automate dist recompilation on Renovate PRs and configure concurrency limit (#120)

### Summary of Changes

1. **Gitea Workflow (.gitea/workflows/recompile-dist.yaml)**:
   - Automates recompilation of dist/index.js on Renovate PRs.
   - Adds loop-prevention check for [skip compile].
2. **Renovate Configuration (
enovate.json)**:
   - Configures branchConcurrentLimit: 2 and prConcurrentLimit: 2.
   - Adds gitIgnoredAuthors for automated bot commits.
   - Adds rebaseWhen: 'behind-base-branch'.
   - Removes postUpgradeTasks.
3. **Test Workflow (.gitea/workflows/test.yaml)**:
   - Added pull_request trigger.
4. **Gitea-Only Setup**:
   - Removed .github/ workflows to keep workflow execution strictly on Gitea.
5. **Preferences (GEMINI.md)**:
   - Documented strict pnpm/pnpx rule.
6. **Tests**:
   - Added afterEach import in __tests__/index.test.js.

Reviewed-on: #120
Reviewed-by: LLMReview <27+autoreview@noreplay.horstenkamp.eu>

GEMINI.md

@@ -7,6 +7,7 @@ This repository is maintained by Gemini.
 *   **Test-Driven Development (TDD):** Wherever possible, Test-Driven Development principles should be followed. Write tests before writing the code they are intended to validate.
 *   **Pre-commit Hooks:** Ensure that `pre-commit` hooks are installed and active before making any commits. This can be done by running `pre-commit install` in your local repository.
     *   **Note for Gemini:** Git commits trigger pre-commit hooks, which can take several seconds (or minutes) to complete. Checking the command status for git commit is only appropriate every 120s.
+*   **Package Manager Preferences:** Always use `pnpm` and `pnpx`. Never use `npm` or `npx` under any circumstances. All package management operations, script runs, and tool invocations must use `pnpm` / `pnpx`.
 
 ## Repository Comparison
 
@@ -32,3 +33,8 @@ The Gitea workflow does the following:
 2.  Sets up Node.js and pnpm.
 3.  Installs the dependencies using `pnpm install`.
 4.  Runs the tests using `pnpm test`.
+
+### Automated Recompilation & Permissions
+
+*   The automated recompilation workflow (`.gitea/workflows/recompile-dist.yaml`) recompiles `dist/index.js` on Renovate PRs and requires `contents: write` permissions to push back to the branch.
+*   Ensure that the Gitea repository workflow settings have write permissions enabled (**Settings** ➔ **Actions** ➔ **General** ➔ **Workflow permissions** ➔ **Read and write permissions**).