refactor(events): relocate events module & update imports
- Move events from utilities/ to top-level events/ with types/, listeners/, utils/ structure
- Update all source/tests/docs to new import paths
- Add backwards compatibility stubs in crewai.utilities.events with deprecation warnings
- Restore test mocks and fix related test imports
* docs: fix API Reference OpenAPI sources and redirects; clarify training data usage; add Mermaid diagram; correct CLI usage and notes
* docs(mintlify): use explicit openapi {source, directory} with absolute paths to fix branch deployment routing
* docs(mintlify): add explicit endpoint MDX pages and include in nav; keep OpenAPI auto-gen as fallback
* docs(mintlify): remove OpenAPI Endpoints groups; add localized MDX endpoint pages for pt-BR and ko
* docs: add RBAC docs and other chores
* docs: fix API Reference rendering; per-locale OpenAPI; add Enterprise RBAC; restructure Examples (EN/PT-BR/KO) + Cookbooks; update nav and links
* docs(i18n): add RBAC docs for pt-BR and ko; update Enterprise Features nav
