EVENT BASED WEIGHTLESSNESS (#37971)

* Init Commit

* Typos

* Commit 2

* Save Interaction Test Mob from failing

* ssss

* Confident I've gotten all the correct prototypes

* Whoops forgot to edit those

* aaaaa

* Better solution

* Test fail fixes

* Yaml fix

* THE FINAL TEST FIX

* Final fix(?)

* whoops

* Added a WeightlessnessChangedEvent

* Check out this diff

* Wait I'm dumb

* Final optimization and don't duplicate code

* Death to IsWeightless

* File scoped namespaces

* REVIEW

* Fix test fails

* FIX TEST FAILS REAL

* A

* Commit of doom

* borgar

* We don't need to specify on map init apparently

* Fuck it

* LOAD BEARING COMMENT

---------

Co-authored-by: Princess Cheeseballs <66055347+Pronana@users.noreply.github.com>

Content.Server/Fluids/EntitySystems/SpraySystem.cs

@@ -166,7 +166,7 @@ public sealed class SpraySystem : EntitySystem
 
             if (TryComp<PhysicsComponent>(user, out var body))
             {
-                if (_gravity.IsWeightless(user, body))
+                if (_gravity.IsWeightless(user))
                 {
                     // push back the player
                     _physics.ApplyLinearImpulse(user, -impulseDirection * entity.Comp.PushbackAmount, body: body);