Enable cli for Github Enterprise

[eliamartani]

Clear and concise description of the problem

When I tried to implement a github action with this plugin, I couldn't because it is designed only for github.com. Not only config definition fails e.g. Error: Can not parse GitHub repo from url but also the endpoint always referes to github.com making it difficult to add in projects inside Github Enterprise

Suggested solution

Add two additional properties in the config to override the default urls so the endpoints will work no matter which Github environment it is.

changelogithub.config.ts

export default {
  baseUrl: "git.custom.com", // default: github.com
  baseUrlApi: "git.custom.com/api/v3", // default: api.github.com
  repo: "eliamartani/myrepo",
};

I honestly couldn't think of a better suggestion to change the repo validation so that's why I put the repo in the example

Alternative

Right now, the only alternative I found is changelogen but I need to create a release manually.

Additional context

No response

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