feat: Set up ktfmt to format code

[honnix]

This might be controversial but it has been something I always struggle with :).

The first commit is adding Bazel support and the second is the reformatting itself.

bazel run format does the job.

If this gets merged, I think we can have a .git-blame-ignore-revs file to ignore the commit reformatting code.

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[tinder-maxwellelliott]

Looks great to me, thanks for adding it