Fix docs: CONTRIBUTING.md references non existent commands for test and formatting

[Cairo09]

CONTRIBUTING.md instructs contributors to run

1. npm run format and npm run format:check
2. npm run test:unit, npm run test:unit:watch and npm run test:unit:coverage
3. npm run test:e2e and npm run test:e2e:headed
   but those scripts are not defined in package.json

Steps to Reproduce:

1. After setup, run above commands, observe Missing script error
2. Run npm run-script and observe above commands do not exist

All commands in CONTRIBUTING.md should be in package.json