ci/cd: add github actions for linting and formatting the code

I suggest if possible to add a Github action that would basically help with orchestrating proper code formatting and linting to make sure only code that passes ci will be accepted. Sooner or later, we may want to add extra layers of testing.

No files, tests, or existing lint and formatting commands are named. Start by inspecting the repository configuration and package scripts to identify the current checks, then define a GitHub Actions workflow that runs them; done means the workflow reliably rejects changes that fail linting or formatting.

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