chore: exclude trivial refactors from `git blame` results (#12550)

See https://docs.github.com/en/repositories/working-with-files/using-files/viewing-a-file#ignore-commits-in-the-blame-view

Ideally all style-only-commits should be put into this list.

The "move to typescript" is not trivial by itself, but most of the
additions / deletions are style changes. So I think it's safe and more
reader-friendly to exclude it.