frontend: Add global search

[sniok]

Global search in top bar

Features:

• Find resources
• Find app pages
• Find clusters
• Custom actions (switching theme)
• Remembers recently used results
• Highlights query text in the output
• Lazy loads component code and resources
• Minimal performance impact when not used (when not used it will display just a placeholder input)

demo

search.mp4

testing done

• a11y: axe and edge a11y quick checks
• narrow screens
• slow network

[joaquimrocha]

This looks and feels (I tested it) pretty awesome! Thanks for implementing it.
At KubeCon, Rene and I talked to some folks from the k8s sig-ui about how we implement things and they were surprised we hold most things in the frontend, and that for dealing with many resources + search, they would recommend having some backend caching. I am mentioning this so we keep it in mind for the search too.

A couple of things I noticed:

1. The search suggests showing pages like the Pods (maybe I have been to them), even when we are at the home view (we need to turn those off if we are not in a cluster view)
2. Changing routes takes too long (at least in dev mode) that it may feel like the jump was not activated. Maybe we could add a spinner to the search or somewhere else (besides speeding up the routes changes).
3. No matching with the Home view (so we can go there without having to use the mouse)

In the future we should also make sure that the plugin defined routes are indexed; and add the ability to specify how to search resources (by doing the json-path matching, or an easier subset of it).

Good job!