#963 Feat(application): the application page as one row of tabs (11/21)

Stack 11/21 · after #962 · next #964

Targets main but builds on #962, so the earlier stack commits show here too: review the last commit only. Merge after #962.

Description of your changes

The application page becomes one row of tabs:

• an overview that says what matters;
• components as rows you can compare, with inferred dependencies;
• sources, policies and triggers as rows in the same style;
• workflows, revisions, and each environment's status.

Row actions are icon buttons on every table.

Fixes #

I have:

• Read and followed KubeVela's contribution process.
• Related Docs updated properly. In a new feature or configuration option, an update to the documentation is necessary.
• Run yarn lint to ensure the frontend changes are ready for review.
• Run make reviewableto ensure the server changes are ready for review.
• Added backport release-x.y labels to auto-backport this PR if necessary.

Special notes for your reviewer

• Existing routes still work; the old per-environment pages are reached from the Environments tab.