Add compress prop (collision)

[fabiot21]

Added compress prop (ref #32) and logic to handle if grid should vertical compress or not when collision is active. If collision = true and compress = false then:

• Enables free item movement on the grid.
• Collision between items leads to relocation of the collided item.
• The relocation is to the first available space.
• Grid can dynamically expand on the y-axis if no space is available.
• Expansion accommodates the relocated item in a new position.

Additionally, a bug has been fixed where the previewItem of items, which had previously collided and been moved, was not updating correctly. This issue occasionally caused certain items to unexpectedly jump to a different position when clicked.

[fabiot21]

@cuire anything else i should add to merge this?

[cuire]

@cuire anything else i should add to merge this?

Thank you for amazing work. Everything is fantastic. Ill merge it in a few hours.