feat: better drop cursor for crepe

[Saul-Mirone]

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Summary

Optimize drag and drop behavior of crepe. Closes: #1370 Closes: #1260

How did you test this change?

CI and Manually

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Name	Status	Preview	Comments	Updated (UTC)
milkdown-storybook	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 17, 2024 10:24am

[nx-cloud[bot]]

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[cypress[bot]]

Passing run #889 ↗︎

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Details:

Merge 5c5960b994307006ebf39e6ddfa1e56c02cc0db0 into 1ee21e8ce5fe8d43075ab57ab7b2...
Project: Default Project	Commit: 87136b60e9 ℹ️
Status: Passed	Duration: 01:42 💡
Started: Jun 17, 2024 10:29 AM	Ended: Jun 17, 2024 10:30 AM

Review all test suite changes for PR #1378 ↗︎

[cypress[bot]]

Passing run #890 ↗︎

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Details:

feat: better drop cursor for crepe (#1378)
Project: Default Project	Commit: c2dff9c7e8
Status: Passed	Duration: 01:51 💡
Started: Jun 17, 2024 10:45 AM	Ended: Jun 17, 2024 10:46 AM

Review all test suite changes for PR #1378 ↗︎