Attempts to fix all physics bugs at once (#3610)

* Fixed Rack/Shelf

* Fixes bookshelf, bed

* Placeable for beds for bedsheets

* Bunch of Physics changes, ask metalgearsloth about em'

* More modifications

* More

* Other stuff

* Organizes entities yaml a little bit

* Something new

* Fixed, happy with the state of this rn

* A

* A

* Ye

* E

* Done for now...

* Applied Reviws

* Changes

* Fix the robust commit

* Fixes tests?

* E

Co-authored-by: metalgearsloth <31366439+metalgearsloth@users.noreply.github.com>
Co-authored-by: Metal Gear Sloth <metalgearsloth@gmail.com>

Content.Shared/GameObjects/Components/Buckle/SharedBuckleComponent.cs

@@ -1,4 +1,4 @@
-#nullable enable
+#nullable enable
 using System;
 using Content.Shared.GameObjects.Components.Strap;
 using Content.Shared.GameObjects.EntitySystems;