Adds CLI for Faros CE

[ypc-faros]

Description

Adds a CLI to quickly set up and sync a few vcs sources.

The CLI can be invoked with no parameters and it will show a number of prompts for the user to choose a source and then source specific parameters (e.g., for github, a github token and repos to sync).

The CLI can also be invoked with subcommands (one per source: github, bitbucket (+ gitlab, jira coming soon) ). One can enter some of the source specific arguments (e.g., --token for github) and the corresponding prompt for that parameter will be skipped.

The integration tests rely on a per-source json configuration to be specified as secrets in the github workflows. Those can also be run manually:

GITHUB_TOKEN=XYZ npm run test:integration -- --coverage

Changes to follow in upcoming PRs:

• Support for jira and gitlab.

Fixes # (issue)

Type of change

(Delete what does not apply)

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Checklist

(Delete what does not apply)

• Have you checked to there aren't other open Pull Requests for the same update/change?
• Have you lint your code locally before submission?
• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?
• Have you successfully run tests with your changes locally?

[thomas-gerber]

OK to merge
We will add in separate PRs:

1. better explanation of how the space bar needs to be used to select
2. limits on repos/projects
3. Jira / Bitbucket support
4. replace clone with some curl downloads