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/Components/JetpackUserComponent.cs

@@ -0,0 +1,14 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Movement.Components;
+
+/// <summary>
+/// Added to someone using a jetpack for movement purposes
+/// </summary>
+[RegisterComponent, NetworkedComponent]
+public sealed class JetpackUserComponent : Component
+{
+    public float Acceleration = 1f;
+    public float Friction = 0.3f;
+    public float WeightlessModifier = 1.2f;
+}