test(eslint): ensure common code doesn't contain desktop or browser code

This MR introduces custom eslint rule that fails if code in src/common folder includes any code from src/desktop folder or src/browser folder.

This is an alternative to more complex tools for enforcing code structure like sub-packages or yarn workspaces.

I've done a series of refactoring:

• refactor: split workflow in browser, common, and desktop folders
• refactor: remove common dependency on desktop
• refactor: move code_suggestions to common folder

and reviews alone wouldn't be able to enforce this structure.