Re-add Prettier GitHub workflow #9163

[rachelwhitton]

This reverts commit eb86890.

Fixes #9082

Summary

per #9163 (comment) and #9163 (comment):

• Adds/updates ESLint. This was added as part of the initial implementation which has been removed. ESLint was left because we'll probably use it again in the future.
• Adds a new npm run lint script in package.json
• Updates the README.md to note how to run ESLint locally or fix all style issues with Prettier (using the existing npm run format command)
• Updates the Prettier config to use JS-based configuration and splits the difference between the old/existing config and the new config in 4ba6420
• Adds a new Prettier GitHub action to run the linter when any *.js file in src/ is affected by a pull request and only on the changed files.
  • Prettier-formatted files affected by this are then committed back to the repository by the robot and a comment is left in the PR that files were changed (see test prettier gh action #9180 (comment) for an example)

[wiz-inc-b08cf2810f]

Wiz Scan Summary

Scan Module						Total
IaC Misconfigurations	0	0	0	0	0	0
Vulnerabilities	0	0	0	0	0	0
Sensitive Data	0	0	0	0	0	0
Secrets	0	0	0	0	0	0
Total	0	0	0	0	0	0

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[stevector]

I expect this PR will be mergable soon since I have drastically reduced the amount of change. #9163 updated prettier and add a few ESLint related packages. It also updated thousands of lines of package-lock.json.

In this PR went back to the package.json and package-lock.json of main and then ran npm install "prettier@^3.0.0" --save-exact.

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[stevector]

And it built successfully! @jazzsequence @rachelwhitton can you review?

[jazzsequence]

lgtm

[stevector]

@jazzsequence Can you review/merge this PR?

[pantheon-decoupled]

⚡ Deployed with Pantheon Decoupled

This build was successfully deployed with Pantheon. You can track the build logs here.

👀 Preview: https://pr-9255-documentation.appa.pantheon.site
🛠️ Manage in Pantheon: https://dashboard.pantheon.io/site/2b30153f-e8b1-4427-b076-6109e704ba5d/overview