Description

Improves error handling and output in a few places:

• Change error strings so they can be distinguished between instances.
• Add error detail by extracting information from error object.

Pull request checklist

• [N/A] Update SETUP.md with any new environmental variables.
• [N/A] Update the documentation.
• Manually test the relevant changes.
• Follow the pull request checklist
• [N/A] Add/update automated tests as needed.

New release checklist

• Automated tests pass.
• The Preparing for release checklist is completed.

Steps to Test

1. Checkout the PR locally.
2. Run npm run build.
3. Add vip-cli/dist/bin from repository to PATH.
4. Run vip-wp.js -y @MYAPP -- user list - observe normal output.
5. Run vip-app.js MYAPP - observe normal output.
6. Change API path (api.wpvip.com) in src/lib/api.ts to api2.wpvip.com.
7. Re-run all steps from 2 above and observe error in output.