feat: add stats subcommand to existing .github command

[oskarnurm]

Relevant Issues

Closes #1724
Fixes #1728

Description

Added the subcommand stats to the existing command .github.

The statscommand will take the arguments <start_date> <end_date> <repo> where the date is formatted YY-MM-DD and repo follows the username/name format. The bot will then fetch and display GitHub stats for the given repo over the specified timeframe.

Example:

Key changes:

This was done by adding several helper methods to githubinfo.py that the stats command would then call:

• get_issue_count
• get_pr_count
• get_commit_count
• get_stars_gained
• parse_date,
• validate_date_format
• validate_date_range

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[jb3]

Feedback comments left.

Please also revert the linting changes you've made to the repository, none of the linting tools we use should've raised errors providing you are using the versions we specify in our pyproject.toml and are using uv & ruff is picking up our configuration correctly.

[oskarnurm]

Thank you @jb3 for the extensive review. I apologize for the headache with the linting. Turns out I was wrong to trust ruff to pick up the pyproject.toml. We will look into fixing the other comments ASAP!

[oskarnurm]

Hey @jb3, I think I have resolved all the issues now. Hopefully didn't miss anything.

Key changes:

• Raising errors instead of returning integers using custom GithubAPIError and StargazersLimitError
• Refactored date parsing with ISODateTime
• Refactored github_stats with try-catch error handling
• Bumped pydis_core to 11.9.0, also pydantic as a dependency (let me know how you want to handle this)
• Refactored get_stars_gained with a helper method get_date_with_cache