fix: prioritize exact type matches in picker and preserve pre-commit colors

[o6uoq]

Summary

• Sort picker types by name length (ascending), then alphabetically, so shorter exact matches rank above longer items that only match via description text (e.g. typing "ci" shows "ci" before "build")
• Connect git commit stdio directly to the terminal so pre-commit hooks retain colored and interactive output
• Style the "Type to filter, Enter to select" hint in dark grey for visual subtlety

Test plan

• TestPickerTypesSortedByLengthThenAlpha updated and passing
• All existing tests pass (go test ./...)
• Pre-commit hooks run with colors preserved
• golangci-lint passes