Introduce more pre-commit hooks.

[ScottTodd]

Progress on #750.

Hook name	documentation
check-merge-conflict	https://github.com/pre-commit/pre-commit-hooks?tab=readme-ov-file#check-merge-conflict
mixed-line-ending	https://github.com/pre-commit/pre-commit-hooks?tab=readme-ov-file#mixed-line-ending
forbid-tabs	https://github.com/Lucas-C/pre-commit-hooks?tab=readme-ov-file#usage

For forbid-tabs, we could also use remove-tabs and automatically replace with 2 or 4 spaces, but I'd rather get the error and fix case by case, since that will ensure we match the local style and indentation.

[benvanik]

This + the cleanup to existing code will be really nice! Projects are very inconsistent even within themselves and it makes editing them require special handling.

[ScottTodd]

cc @ammallya @jayhawk-commits from ROCm/rocm-libraries#117, we may want these in https://github.com/ROCm/rocm-libraries/blob/develop/.pre-commit-config.yaml (and other projects) too

[ScottTodd]

Had some file permissions changes sneak in that are tricky to undo... going to force push rebase those away, then merge.