[ENH,MNT] Assign Bot (assigned issues>2)

[aryanpola]

Reference Issues/PRs

Fixes point 2 of #2697

What does this implement/fix? Explain your changes.

The user cannot assign the issue using aeon-actions-bot when they have more than 2 open issues assigned to themselves.

1. The bot leaves a comment with open issues of the respective user.
2. This does not apply to people with write access.

The output when I ran this locally using dummy data.

[aeon-actions-bot]

Thank you for contributing to aeon

I have added the following labels to this PR based on the title: [ $\color{#FEF1BE}{\textsf{enhancement}}$, $\color{#EC843A}{\textsf{maintenance}}$ ].

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PR CI actions

These checkboxes will add labels to enable/disable CI functionality for this PR. This may not take effect immediately, and a new commit may be required to run the new configuration.

• Run pre-commit checks for all files
• Run mypy typecheck tests
• Run all pytest tests and configurations
• Run all notebook example tests
• Run numba-disabled codecov tests
• Stop automatic pre-commit fixes (always disabled for drafts)
• Disable numba cache loading
• Push an empty commit to re-run CI checks

[MatthewMiddlehurst]

Please show this is running as expected and test it on your fork.

[MatthewMiddlehurst]

See #2703

[aryanpola]

@MatthewMiddlehurst Here is the link for the assign bot test