Allowing Generator to pull the templates from the private GitHub Repository

[AayushSaini101]

Why do we need this improvement?

We have already introduced to pull the templates from the private registries like npm, nexus etc, we can extend it to allow the templates from the github/gitlab repositories as well

How will this change help?

Developer can use the generator for the internal use case efficiently

Screenshots

No response

How could it be implemented/designed?

• Add case to handle the templates fetching from the private github/gitlab repositories

🚧 Breaking changes

Yes

👀 Have you checked for similar open issues?

• [X] I checked and didn't find a similar issue

🏢 Have you read the Contributing Guidelines?

• [X] I have read the Contributing Guidelines

Are you willing to work on this issue?

Yes, I am willing to submit a PR

[lmgyuan]

Would you like to share some thoughts on how you would like to implement the feature? : ) Since you are willing to submit a PR.