Jetpacks (#9023)

* Movement acceleration

* tweaks

* Weightless refactor coz fuck it

* CCVars

* weightless movement tweaks

* Some cleanup while I'm here

* dorkpacks

* thanks fork

* fixes

* zoomies

* toggles

* hmm

* yamls

* b

* so true

* Effects refactor

* namespace

* review

Content.Shared/Movement/Systems/MovementIgnoreGravitySystem.cs

@@ -0,0 +1,26 @@
+using Content.Shared.Movement.Components;
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Movement.Systems;
+
+public sealed class MovementIgnoreGravitySystem : EntitySystem
+{
+    public override void Initialize()
+    {
+        SubscribeLocalEvent<MovementIgnoreGravityComponent, ComponentGetState>(GetState);
+        SubscribeLocalEvent<MovementIgnoreGravityComponent, ComponentHandleState>(HandleState);
+    }
+
+    private void HandleState(EntityUid uid, MovementIgnoreGravityComponent component, ref ComponentHandleState args)
+    {
+        if (args.Next is null)
+            return;
+
+        component.Weightless = ((MovementIgnoreGravityComponentState) args.Next).Weightless;
+    }
+
+    private void GetState(EntityUid uid, MovementIgnoreGravityComponent component, ref ComponentGetState args)
+    {
+        args.State = new MovementIgnoreGravityComponentState(component);
+    }
+}