feat: Flag forms of adjective "loose" used when forms of "lose" were meant

These are very common among non-native speakers and not that rare among native speakers.

I will win and you will loose. → lose
You are such a looser! → loser
I am winning and you are loosing! → losing

My browser catches all three:

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I'll add examples here from the wild as I find them:
- There is a good chance that a lot of peoppe will **loose** their jobs.
- the more the dollar will continue to **loose** value

The issue names no files or tests. Start by finding Harper’s rule entry point and existing tests for word-form mistakes, then compare their diagnostics with the three examples. Done means the checker flags loose, looser, and loosing when lose, loser, and losing are intended, while preserving valid uses.

Written by the indexing model from the issue text.