Refactor UpdateKinematics() and fix a lot of Content warnings (#1709)

Most warnings were related to EntityQuery and IPhysicsComponent.
Partially fixes #1650 and fixes #1682

Content.Server/GameObjects/Components/Projectiles/ThrownItemComponent.cs

@@ -88,7 +88,7 @@ namespace Content.Server.GameObjects.Components.Projectiles
 
         public void StartThrow(Vector2 direction, float speed)
         {
-            var comp = Owner.GetComponent<IPhysicsComponent>();
+            var comp = Owner.GetComponent<ICollidableComponent>();
             comp.Status = BodyStatus.InAir;
 
             var controller = comp.EnsureController<ThrownController>();