Rewrite and refactor the entire script.

[knadh]

• Fully refactor the event handling approach and rewite the script to just have 3 global listeners instead of the earlier approach of having 2 events per item.
• Maintain items in a WeakMap() instead of a maintaing states in a function per object.
• Simplify logic for readability.
• Add remove() to allow the drag/move events on an object to be unregistered.

The new approach should is significantly more memory efficient.

Closes #2.

[Lemfap]

• Fully refactor the event handling approach and rewite the script to just have 3 global listeners instead of the earlier approach of having 2 events per item.

• Maintain items in a WeakMap() instead of a maintaing states in a function per object.

• Simplify logic for readability.

• Add remove() to allow the drag/move events on an object to be unregistered.

The new approach should is significantly more memory efficient.

Closes #2.

[Lemfap]

aa6399d254a7d2fccb74bc19b3f55927d4b462da__