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>

__tests__/index.test.js

@@ -1,4 +1,4 @@
-import { vi, describe, it, expect, beforeEach } from "vitest";
+import { vi, describe, it, expect, beforeEach, afterEach } from "vitest";
 
 // Mock @actions/core for all tests in this file
 vi.mock("@actions/core", () => ({