[WIP] Add display of remaining GitHub agent requests

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original prompt

add into the github website how many github agent requests you have for the rate limit remaining

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[DonnieBLT]

@copilot try again

[DonnieBLT]

@copilot continue