Better code navigation support for multi-module projects

[nickzhums]

Mentioned in user interview.
Seems like in current VS Code Java, if we have multiple POMs, and parent POM, sometimes jumping between different references is not available.

Also, user wants to have IDEA-like UX to show the usage stats of references of a particular class.

[F-6666]

// On explicit save, run fixAll source action. On auto save (window or focus change), run organizeImports source action.
"editor.codeActionsOnSave": {
"source.fixAll": "explicit",
"source.organizeImports": "always",
}