format: Configure Prettier for all workspaces

[nvsriram]

This PR adds:

• Add Prettier as a devDependency with global .prettierrc.json configuration
• Add prettier npm script for all workspaces:
  • npm run prettier in a specific workspace will only format the files in the workspace
  • npm run prettier in root directory will format the files in all workspaces
• Run Prettier on all workspaces to format all relevant files

[kcsongor]

This is great! Let's coordinate here, and do this after some major changes to the cli have been merged in to avoid conflicts? In particular, the sui cli work is still in progress, but nearly ready.

[nvsriram]

This is great! Let's coordinate here, and do this after some major changes to the cli have been merged in to avoid conflicts? In particular, the sui cli work is still in progress, but nearly ready.

Sounds good, aligned with that!