chore(lint): make lint-typos helpful

[ilikecodewithmyhand]

Closes #3184

Reduce typos lint noise from 16,944 errors to 0 by excluding specs/ submodule and add typos-cli installation check with user prompt.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.7%. Comparing base (01de8f5) to head (75f4a48).
⚠️ Report is 9 commits behind head on main.
✅ All tests successful. No failed tests found.

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[einar-oplabs]

This is great! What about the actual typos that are in the repo?

[ilikecodewithmyhand]

This is great! What about the actual typos that are in the repo?

Good question! I verified this by running typos with and without the specs/ exclusion:

• Without excluding specs/: 16,944 errors (all from the specs/ submodule)
• Main kona codebase only: 0 errors ✅

All typos originate from the specs/ submodule, which is maintained upstream. The main kona codebase has zero typos, so we're not hiding any real issues by excluding specs

[github-actions]

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