feat: swap github_user with more generic options to allow for bitbucket/gitlab compatibility moving forward

Author: 56kyle

cookiecutter.json

@@ -7,7 +7,9 @@
   "add_rust_extension": false,
   "author": "Kyle Oliver",
   "email": "56kyleoliver+cookiecutter-robust-python@gmail.com",
-  "github_user": "56kyle",
+  "repository_provider": ["github", "gitlab", "bitbucket"],
+  "repository_host": "{% if cookiecutter.repository_provider == 'github' %}github.com{% elif cookiecutter.repository_provider == 'gitlab' %}gitlab.com{% else %}bitbucket.org{% endif %}",
+  "repository_path": "56kyle/{{ cookiecutter.project_name.replace('_', '-') }}",
   "version": "0.0.0",
   "copyright_year": "{% now 'utc', '%Y' %}",
   "license": ["MIT", "Apache-2.0", "GPL-3.0"],