Related to #15758.
This PR adds new prettier scripts to run on the whole repo. I also
updated the prettierignore files to ignore additional files. The
`prettier --write .` command should also now work from the root of any
release group.
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Co-authored-by: Scott Norton <scottnorton@microsoft.com>
Co-authored-by: Mark Fields <markfields@users.noreply.github.com>