Set up Prettier to enforce code style #255
Description
Similar to the Trace Extension, we need to set up Prettier to enforce code style for the timeline chart. This includes:
[ ] Setting up Prettier in the repo so contributors can format their commits.
[ ] Setting up Prettier in CI to enforce code style.
[ ] Format the source code with Prettier.
[ ] Add documentation for Prettier.
[ ] Add a .git-blame-ignore-revs file to ignore the formatting commit.
Similar to this issue.