Drag cells to move

[davidfig]

• [x] hover in the top-left corner of the cursor origin shows a drag cursor
• [x] click on that corner starts a move
• [x] during cell moving, the floating context menu is hidden
• [x] show UI (skeleton box) when dragging cell
• [x] cancel move on escape
• [x] cut-and-paste cells when releasing move
• [x] moving to the viewport borders scrolls the viewport

[vercel[bot]]

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Name	Status	Preview	Updated (UTC)
quadratic	✅ Ready (Inspect)	Visit Preview	May 8, 2024 7:02pm

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 96.55172% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 89.24%. Comparing base (6f5438b) to head (7859a7f).

Files	Patch %	Lines
...dratic-core/src/controller/operations/operation.rs	0.00%	2 Missing :warning:
.../execution/execute_operation/execute_move_cells.rs	91.66%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1332      +/-   ##
==========================================
+ Coverage   89.15%   89.24%   +0.08%     
==========================================
  Files         159      160       +1     
  Lines       26240    26319      +79     
==========================================
+ Hits        23395    23489      +94     
+ Misses       2845     2830      -15     

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[ddimaria]

Rust lint is failing. Also, this branch is out of date with main.