[Feature]: support "table" shape about tldraw

[linear]

TLD-2486 [Feature]: convert a grid area to a shape

[xuanswe]

I would try to give my proposal on how it could be implemented.

I think this should work similar to how we draw a Rectangle shape.

1. Select shape Rectangle
2. Drag the mouse
3. The start point and the end point form the rectangle

For a Table shape, we can do the same

1. Select shape Table
2. Drag the mouse
3. The start point and the end point form the rectangle area where we can create a table inside this area

5. The rectangle area at step 3 covers a specific grid behind it and can create the table on top of that grid

Note that it could work even if the user doesn't enable "Preferences > Show grid."
The app knows about the grid even if it is not shown visually.
The user doesn't need to see the grid because we can show the table shape on the fly, so user knows what is the final shape before release the mouse.

After creating the table shape, the user can easily resize as usual to scale up/down for bigger/smaller cells.

[xuanswe]

Maybe I over complicated this shape when relating it with the grid system.
An easier way is just having a normal table shape.
By knowing the drag area, we can compute the number of cells per row/col of the table.
User can resize the whole shape, which will resize the cells accordingly.

=> I updated the original title/description with this simplification.