feat: add OpenAPI generation script and workflow

- Introduced a new script to generate OpenAPI specifications for the Dokploy API.
- Added a GitHub Actions workflow to automate the generation and syncing of OpenAPI documentation upon changes in the API routers.
- Updated package.json files to include new commands for generating OpenAPI specifications.
- Added openapi.json to .gitignore to prevent accidental commits of generated files.

.gitignore

@@ -13,6 +13,8 @@ node_modules
 .env.test.local
 .env.production.local
 
+openapi.json
+
 # Testing
 coverage