get that crap outta here (completely rewrites inventorysystem) (#5807)

* some work

* equip: done
unequip: todo

* unequipping done & refactored events

* workin

* movin

* reee namespaces

* stun

* mobstate

* fixes

* some work on events

* removes serverside itemcomp & misc fixes

* work

* smol merge fix

* ports template to prototype & finishes ui

* moves relay & adds containerenumerator

* actions & cuffs

* my god what is actioncode

* more fixes

* im loosing my grasp on reality

* more fixes

* more work

* explosions

* yes

* more work

* more fixes

* merge master & misc fixed because i forgot to commit before merging master

* more fixes

* fixes

* moar

* more work

* moar fixes

* suffixmap

* more work on client

* motivation low

* no. no containers

* mirroring client to server

* fixes

* move serverinvcomp

* serverinventorycomponent is dead

* gaming

* only strippable & ai left...

* only ai and richtext left

* fixes ai

* fixes

* fixes sprite layers

* more fixes

* resolves optional

* yes

* stable™️

* fixes

* moar fixes

* moar

* fix some tests

* lmao

* no comment

* good to merge™️

* fixes build but for real

* adresses some reviews

* adresses some more reviews

* nullables, yo

* fixes lobbyscreen

* timid refactor to differentiate actor & target

* adresses more reviews

* more

* my god what a mess

* removed the rest of duplicates

* removed duplicate slotflags and renamed shoes to feet

* removes another unused one

* yes

* fixes lobby & makes tryunequip return unequipped item

* fixes

* some funny renames

* fixes

* misc improvements to attemptevents

* fixes

* merge fixes

Co-authored-by: Paul Ritter <ritter.paul1@gmail.com>

Content.Shared/Inventory/SlotFlags.cs

@@ -0,0 +1,29 @@
+using System;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Inventory;
+
+/// <summary>
+///     Defines what slot types an item can fit into.
+/// </summary>
+[Serializable, NetSerializable]
+[Flags]
+public enum SlotFlags
+{
+    NONE = 0,
+    PREVENTEQUIP = 1 << 0,
+    HEAD = 1 << 1,
+    EYES = 1 << 2,
+    EARS = 1 << 3,
+    MASK = 1 << 4,
+    OUTERCLOTHING = 1 << 5,
+    INNERCLOTHING = 1 << 6,
+    NECK = 1 << 7,
+    BACK = 1 << 8,
+    BELT = 1 << 9,
+    GLOVES = 1 << 10,
+    IDCARD = 1 << 11,
+    POCKET = 1 << 12,
+    LEGS = 1 << 13,
+    FEET = 1 << 14,
+}