[Not verified, do not review now.]Support cursorrules for OpenHands

[AutoLTX]

• [ ] This change is worth documenting at https://docs.all-hands.dev/
• [ ] Include this change in the Release Notes. If checked, you must provide an end-user friendly description for your change below

End-user friendly description of the problem this fixes or functionality this introduces.

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Summarize what the PR does, explaining any non-trivial design decisions. Support cursorrules in OpenHands like repo.md

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Link of any specific issues this addresses: https://github.com/All-Hands-AI/OpenHands/issues/7358