chore: add post-rewrite hook to catch dependency issues after rebase

[grypez]

Runs yarn lint:dependencies after rebase/amend operations to catch unused dependencies in package.json that lint-staged doesn't detect.

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Note

Adds git hook to enforce dependency hygiene after history rewrites

• Introduces post-rewrite in simple-git-hooks to run yarn lint:dependencies, ensuring unused/missing deps are caught after rebase/commit --amend events.
• No code or runtime changes; tooling-only update in package.json.

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[rekmarks]

Good.