fix: removed wrappers, included warning on invalid user command

[DrKJeff16]

Changes

• require('spinner').setup() is no longer a wrapper for a function
• require('spinner.cmd').setup() is no longer a wrapper for a function
• Added/improved notification strings for user command

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.17%. Comparing base (d0ff695) to head (24a5be7).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #99   +/-   ##
=======================================
  Coverage   99.17%   99.17%           
=======================================
  Files           8        8           
  Lines         729      729           
=======================================
  Hits          723      723           
  Misses          6        6           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.