Progress bar display mode

[MatthewMckee4]

Add a progress bar that shows overall test completion, currently running tests, and pass/fail counts. Nextest supports multiple progress display modes:

• bar — visual progress bar with stats
• counter — simple numeric counter (e.g. "42/100 tests")
• none — no progress display

karva test --show-progress bar

Karva currently has --no-progress to hide individual results, but a visual progress bar would be a better experience for large test suites.

See: https://nexte.st/docs/running/#reporter-options