chore: enable ts for the clang-format workflow

[BeksOmega]

The basics

• I branched from develop
• My pull request is against develop
• My code follows the style guide
• I ran npm run format and npm run lint

The details

Resolves

N/A

Proposed Changes

Enables the format action to format ts files.

Behavior Before Change

The format workflow would fail because it couldn't find any files.

Behavior After Change

The format workflow succeeds (hopefully). But I can't test. Changes are based on: https://github.com/DoozyX/clang-format-lint-action

Reason for Changes

Get CI working for typescript.

Test Coverage

N/A

Documentation

N/A

Additional Information

Follow up to: https://github.com/google/blockly/pull/6220/files

[BeksOmega]

I don't know why this is still failing. It's definitely supposed to be a comma-separated list of file extensions (see here and here). But for some reason it's still running with "--extensions" "js".

[cpcallen]

This will only affect commits to pull requests targetting the master branch. Did you mean to commit it to develop instead?

[BeksOmega]

This will only affect commits to pull requests targetting the master branch. Did you mean to commit it to develop instead?

Oh I thought that workflows had to be defined in whatever the main branch of the repository is (like issue and PR templates). Turns out they need to exist on the branch you're merging in, aka the branch your PR is associated with.