feat(ui): Information header for selected resource panel

[rbreeze]

Also includes refactored Tabs component that's functional instead of class-based.

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
• The title of the PR states what changed and the related issues number (used for the release note).
• I've included "Closes [ISSUE #]" or "Fixes [ISSUE #]" in the description to automatically close the associated issue.
• I've updated both the CLI and UI to expose my feature, or I plan to submit a second PR with them.
• Does this PR require documentation updates?
• I've updated documentation as required by this PR.
• Optional. My organization is added to USERS.md.
• I have signed off all my commits as required by DCO
• I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
• My build is green (troubleshooting builds).

[codecov-io]

Codecov Report

Merging #5557 (60c5e9b) into master (61080b3) will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5557      +/-   ##
==========================================
+ Coverage   40.93%   40.97%   +0.03%     
==========================================
  Files         147      147              
  Lines       19661    19691      +30     
==========================================
+ Hits         8049     8069      +20     
- Misses      10508    10518      +10     
  Partials     1104     1104              

Impacted Files	Coverage Δ
reposerver/repository/repository.go	61.66% <0.00%> (-0.40%)	⬇️
util/git/creds.go	9.62% <0.00%> (ø)
util/helm/helm.go	60.27% <0.00%> (ø)
util/cache/redis.go	48.83% <0.00%> (ø)
util/helm/client.go	45.02% <0.00%> (ø)
server/cache/cache.go	73.33% <0.00%> (ø)
util/oidc/provider.go	0.00% <0.00%> (ø)
util/session/state.go	69.81% <0.00%> (ø)
util/cache/inmemory.go	35.13% <0.00%> (ø)
util/ksonnet/ksonnet.go	40.00% <0.00%> (ø)
... and 3 more

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[alexmt]

Great improvement of resource details panel!

However, can we switch to new tabs in a separate PR? If we are switching to new tabs style then we should switch everywhere (probably including argo workflow). We should discuss new tabs style at least once before migrating.

[alexmt]

LGTM