GhApi.get_repo_contents method

[KeremTurgutlu]

This PR adds couple of utility methods to get repo file contents, which can be useful for dynamically creating the LLM context. Tested these changes locally with my editable builld.

get_repo_files(self:GhApi, owner, repo, branch="main", inc=None, exc=None):

This method returns all the repo files recursively using git.get_tree as recommended in the official GH api docs and allows filtering by passing inc:included and exc:excluded Unix-style wildcards using fnmatch. If a file matches one of the patterns in both included and excluded lists, then * expression is prioritized, if both have * expression than the longer expression is prioritized. This is useful for some common filtering cases, for example "Exclude all .md files expect for README.md", or "Include all .py files except for tests".

get_file_content(self:GhApi, path, owner, repo, branch="main"):

Gets file content of given file and also decodes the file content.

get_repo_contents(self:GhApi, owner, repo, **kwargs):

This uses GhApi.get_repo_files + parallel GhApi.get_file_content to get all repo contents.

More examples and explanations can be found in the core nb.

[jph00]

@KeremTurgutlu sorry I forgot to look at this! It looks great :D My only request is that you cut back on the output so that the docs are more concise. We really like things to be concise! Having more stuff for the user to read is a burden that we should only require where the upside outweighs the downside. So have a look at each line of code and each line of output and think about whether reaches that bar. If it doesn't, cut it back until it does.