Restructure dashboard codebase

[somebody1234]

Pull Request Description

Warning

Currently needs to be updated using the most recent suggestions in #13217

• Close IDE Codebase structure #13217
  • Move dashboard/components/ to react-components/
  • Move dashboard/authentication/ to authentication/
  • Move dashboard/layouts/Settings/ to settings/
  • Move */Drive/ to data-catalog/
  • Move dashboard/services/ to services/
  • Move some hooks/ and modals/ to more appropriate locations
  • Remove unused assets/
  • Update CODEOWNERS

Important Notes

None

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• The documentation has been updated, if necessary.
• Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
• All code follows the
  Scala,
  Java,
  TypeScript,
  and
  Rust
  style guides. In case you are using a language not listed above, follow the Rust style guide.
• Unit tests have been written where possible.
• If meaningful changes were made to logic or tests affecting Enso Cloud integration in the libraries,
  or the Snowflake database integration, a run of the Extra Tests has been scheduled.
  • If applicable, it is suggested to paste a link to a successful run of the Extra Tests.

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[farmaazon]

The strcuture is a bit "too flat" to my liking.

• personally, I would not mix logic with display. I would see authentication to have mostly "logic for authentication" (cognito & co.). Most of the moved react components are actually pages, so maybe put them in pages subdir?
• settings, data-catalog, (and consequently project-view) could be inside tabs or grouped with AppContainer (so we have AppContainer dir with Settings, DataCatalog, ProjectView dirs and AppContainer.vue, index.ts files.

Let others also speak.

[somebody1234]

yup, that makes sense. also of note: i want to move Editor.tsx somewhere more appropriate (and perhaps ideally it should be phased out entirely, as is it is an unnecessary React layer between the Vue root and the Vue project-view)

[somebody1234]

other notes:

• dashboard/utilities/, project-view/util/, utils/, and enso-common are not being merged in this PR as i think that is a much more complex topic that requires further discussion

[somebody1234]

update: yes the new structure is very flat, do appreciate more discussion though.
my goals for this restructure:

• remove dashboard/ as a top level concept
• (less important) reduce unnecessary nesting - 1-2 levels on average is much better than 3-5 levels