Add visibility info for github_repo module

[emersonyh]

Summary

When creating a new repository, allow the user to specify a specific visibility info (internal for example).

Issue Type

Feature Idea

Component Name

github_repo

Additional Information

- name: Create a Github repository
  community.general.github_repo:
    access_token: mytoken
    organization: MyOrganization
    name: myrepo
    description: "Just for fun"
    visibility: internal
    state: present
  register: result

Code of Conduct

• [X] I agree to follow the Ansible Code of Conduct

[ansibullbot]

Files identified in the description:

• plugins/modules/github_repo.py

If these files are incorrect, please update the component name section of the description or use the !component bot command.

click here for bot help

[ansibullbot]

cc @atorrescogollo @stpierre click here for bot help