Deprecate node-menunav and node-focusmanager

This is a follow up of https://github.com/yui/yui3/pull/478/.

### TODOs

- [x] `@deprecated` details w/ version number.
- [x] Updates to component user guides adding info about deprecation.
- [ ] Blog post forecasting deprecation.
- [x] Log warns when using APIs.
- [x] Update HISTORY.md files.