feat: Add github option in the init

[fabien0102]

Add github option on the init command.

This will ask and store a github token if needed and provide a nice autocompletion on your github projets.

Closed #44

Known issues

• The output on error handling on 401 is not the best
• If the openapi specs is too deep in the tree, github will not display it

[needim]

I think we should drop this, if we go on this path, we should consider Gitlab and other VSCs and their self-hosted versions also. :(

[fabien0102]

This is just about the init command, the feature is already there (and used in production 😅)

But yeah, if somebody want bitbucket or gitlab, I will be totally happy to add them 😁

[needim]

Ok then 😅, I have hosted Gitlab, I can invite you in a project :)