Grid Inventory (#21931)

* Grid Inventory

* oh boy we keep cracking on

* auto insertion is kinda working? gross, too!

* pieces and proper layouts

* fix the sprites

* mousing over grid pieces... finally

* dragging deez nuts all over the screen

* eek!

* dragging is 90% less horrendous

* auto-rotating

* flatten

* Rotation at last

* fix rotation and change keybind for removing items.

* rebinding and keybinding

* wow! look at that! configurable with a button! cool!

* dragging is a bit cooler, eh?

* hover insert, my beloved

* add some grids for storage, fix 1x1 storages, fix multiple inputs at once

* el navigation

* oh yeah some stuff i forgor

* more fixes and QOL stuff

* the griddening

* the last of it (yippee)

* sloth review :)

Content.Shared/ContainerHeld/ContainerHeldSystem.cs

@@ -29,7 +29,7 @@ public sealed class ContainerHeldSystem : EntitySystem
         {
             return;
         }
-        if (_storage.GetCumulativeItemSizes(uid, storage) >= comp.Threshold)
+        if (_storage.GetCumulativeItemAreas(uid) >= comp.Threshold)
         {
             _item.SetHeldPrefix(uid, "full", item);
             _appearance.SetData(uid, ToggleVisuals.Toggled, true, appearance);