feat(ui): add coverage

[userquin]

This PR adds the coverage folder in a new iframe inside Coverage component:

• coverage css files not being served
• vite tranforms coverage html pages, I need to find a way to exclude them
• fix coverage error (check the screenshot below): I guess the error comes when Vite injects @vite/client script

To test the coverage run pnpm run build && pnpm run test from root folder and from another shell run cd packages/ui && nr dev:ui.

/cc @edimitchel : from your comment here #493 (comment)

closes #2336

[userquin]

It is working but only with bundled ui, using it on dev I cannot make it working (css not being loaded):

• pnpm run install && pnpm run build from root
• cd test/core && pnpm vitest --ui

We also need to disable coverage button while running and adding small delay once tests run finish.

The css styles using istambul in dark mode needs a review: https://streamable.com/8jsoac

[userquin]

Lastest changes: https://streamable.com/3ek8l0

[userquin]

I need to add another script to enable coverage, rn enabled in tests/core.

We also need to check pnpm.override in root package.json, update esbuild version.

[edimitchel]

I wondering, won't you able to reuse raw data and attach coverage information to each test suite and show the coverage on suite/test items list, and details put in a test details tab?

[userquin]

I wondering, won't you able to reuse raw data and attach coverage information to each test suite and show the coverage on suite/test items list, and details put in a test details tab?

Yeah, I'll work next weekend on this - current state was simple, just adding a middleware and some client stuff, your proposal requires a bit more work