Add Knip check for unused files

[mrubens]

Important

Add Knip check for unused files and remove several unused files from the project.

• GitHub Actions:
  • Adds knip job to code-qa.yml to check for unused files using Knip.
  • Configures Node.js environment and installs dependencies before running Knip.
• Configuration:
  • Introduces knip.json to specify entry points, project files, and ignored paths for Knip.
• Package Management:
  • Adds knip script to package.json to run Knip checks.
  • Adds knip as a dev dependency in package.json.
• File Removals:
  • Deletes o1-format.ts, DiagnosticsMonitor.ts, TerminalActions.ts, get-python-env.ts, Demo.tsx, TabNavbar.tsx, and GitService.ts as unused files.

^{This description was created by for 816847c. It will automatically update as commits are pushed.}

[changeset-bot]

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Latest commit: 816847c

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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