feature: add deploy npm script to package.json

## Description

As part of schematics, it would be nice to also add a `"deploy": "ng run :deploy"` npm script to follow usual nodejs project conventions.
This is also a good thing to have when you don't have a global ng cli install, as you can directly use the local install this way, not needing to change anything on your env to deploy.

## Type of change

Please delete options that are not relevant.

- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
- [ ] This change requires a documentation update