feature: extract azure logic into a separate library

## Description

Many of the Azure logic used in this tool (like login, subscription selection, resource group selection/creation, etc) could be extracted in a separate library, independant from the Angular schematics/builds.

By doing this, it could help bootstrapping other tools, like a standalone CLI to do the same deployment logic for React/Vue projects.

## 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