fix(ci): resolve release pipeline conflicts and clean repo structure

- Delete conflicting .releaserc.json (keep release.config.cjs as single source)
- Fix repo URL from Draculabo/AntigravityManager to evandrodevbr/GeminiNexus
- Fix @semantic-release/git to commit pnpm-lock.yaml (not package-lock.json)
- Normalize Node.js version to 20 across all workflows
- Add packageManager field to package.json for pnpm consistency
- Update AGENTS.md: npm -> pnpm (18 references)
- Update .gitignore: add tools/, thoughts/, binaries, one-shot scripts

.github/workflows/publish.yaml

@@ -2,7 +2,7 @@ name: Publish Release
 
 on:
   workflow_run:
-    workflows: ["Release"]
+    workflows: ['Release']
     types: [completed]
   workflow_dispatch:
     inputs: