[Tracking]: Test Polish 💅

[JReinhold]

Stakeholders: @JReinhold, @yannbf, @ghengeveld

This is a tracking issue for the Test Polish project. The overall goal of the project is to polish up the new Testing-features, including improving existing features, introducing new minor ones, and fixing bugs.

Milestones 🚩

Update Testing Module UI

Owner: @ghengeveld

• Update sidebar context menu
• Update testing module UI
• Make Coverage status update on watched changes
• Bring back green border UI for changing settings. Note: May depend on Change Test Provider Architecture milestone
• Add tooltips
• Navigate to panel on status click
• Add pulsing status when running stories
• Update docs with new screenshots (@kylegach)

Handle unhandled errors

Owner: @yannbf

• Research if Vitest v3 already solves this problem
• Research how this will be surfaced to the user (UI?) - does it fit with the existing error UI we have in SB?
• Experiment with the fix proposed by Tom in the GH issue, discover edge cases
• Addon Test: Improve unhandled error messages #30754

Experimental CDP functionality

Owner: @yannbf

• Write recipe
• Write RFC including the recipe
• Add telemetry to collect metric on the recipe usage

Change Status Architecture

Owner: @JReinhold

• Add new Status Store
• Add useStatusStore manager-hook
• Update Addon Test to use new Status Store
• Update VTA to use new Status Store
• Remove existing Status API
• Write migration notes

Change Test Provider Architecture

Owner: @JReinhold

• Add new Test Provider Store
• Addon Test: Migrate pending/running/etc. state to internal (existing) store
• Addon Test: Replace test progress handling with direct calls to Status Store
• VTA: Migrate pending/running/etc. state to internal store
• VTA: Replace test progress handling with direct calls to Status Store
• Remove existing Test Provider API (except for render and sidebarContextMenu)