Per-map parallax support (#9786)

* Per-map parallax support

* Comments for future sloth

* c

* bet

* Fix exception

* VV support

* Fix parallax

* mem

* weightless sounds

* Gravity stuff

* placeholder coz im too lazy to stash don't @ me son

* decent clouds

* sky

* Fast parallax

* Imagine spelling

* Loicense

* perish

* Fix weightless status

Co-authored-by: metalgearsloth <metalgearsloth@gmail.com>

Content.Shared/Movement/Components/FootstepModifierComponent.cs

@@ -1,17 +1,15 @@
 using Content.Shared.Sound;
+using Robust.Shared.GameStates;
 
 namespace Content.Shared.Movement.Components
 {
     /// <summary>
     /// Changes footstep sound
     /// </summary>
-    [RegisterComponent]
+    [RegisterComponent, NetworkedComponent]
     public sealed class FootstepModifierComponent : Component
     {
         [DataField("footstepSoundCollection", required: true)]
-        public SoundSpecifier SoundCollection = default!;
-
-        [DataField("variation")]
-        public float Variation = default;
+        public SoundSpecifier Sound = default!;
     }
 }