filter by timeframe

for `get_commits()`, `get_issues()` and `get_pull_requests()` it would be great to be able to filter by date. So if we would like to get all PRs in 2024, we could say something like `get_pull_requests(from = ... , to = ...). Would need to decide on a data format etc. Currently, we have that data and can filter afterwards, but we really only want to retrieve what's necessary.

Inspect the implementations of get_commits(), get_issues(), and get_pull_requests() to see how date data and retrieval are currently handled. Decide on the date-filter format and define completion as all three functions accepting the filter and retrieving only results within the requested timeframe.

Written by the indexing model from the issue text.