Watch mode: Add key command to re-run tests

[horsefacts]

Component

Forge

Describe the feature you would like

From time to time, I'd like to re-run tests in --watch mode without changing and saving a file. This is especially useful for fuzz tests, where I might want to see a few example failures in a row to understand why a particular test is failing. It would be nice to be able to press a hotkey to re-run all tests.

Jest's watch mode is a good example: pressing a at any time in watch mode re-runs all tests:

Additional context

No response