Add access control checks to dashboard

[jraddaoui]

• Add home page.
• Split layout store:
  • Move user related elements to its own auth store.
• Allow to disable OIDC authentication:
  • Consider a new environment variable to disable OIDC authentication.
  • Move configuration and user manager to auth store.
  • Remove user menu from sidebar and user name from home page when authentication is disabled.
  • Redirect to home page when visiting user signin pages with authentication disabled.
• Add access control checks:
  • Consider new environment variables to enable Attribute Based Access Control and get a set of user attributes from a configurable claim in the access token.
  • Add attributes to auth store state and include actions to parse and check those attributes.
  • Configure protected routes and check attributes before each route change, redirecting to the home if the check fails.
  • Modify or hide elements (links, tabs, etc.) based on user attributes.

Refs #957.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 53.10%. Comparing base (9ef2178) to head (f3e0f70).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #978 +/- ## ======================================= Coverage 53.10% 53.10% ======================================= Files 101 101 Lines 5661 5661 ======================================= Hits 3006 3006 Misses 2407 2407 Partials 248 248 ```

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[jraddaoui]

@djjuhasz, @sevein, @sbreker

I'm struggling with the tests a little more than expected and it's getting late to review and merge, while I work in the documentation. Sorry about that, I'll restore and add more tests in a different PR. Again, I think it makes more sense to review commit by commit.

[jraddaoui]

Thanks @djjuhasz!