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

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

Content.Shared/Friction/TileFrictionController.cs

@@ -73,7 +73,7 @@ namespace Content.Shared.Friction
 
                 // If we're not touching the ground, don't use tileFriction.
                 // TODO: Make IsWeightless event-based; we already have grid traversals tracked so just raise events
-                if (body.BodyStatus == BodyStatus.InAir || _gravity.IsWeightless(uid, body, xform) || !xform.Coordinates.IsValid(EntityManager))
+                if (body.BodyStatus == BodyStatus.InAir || _gravity.IsWeightless(uid) || !xform.Coordinates.IsValid(EntityManager))
                     friction = xform.GridUid == null || !_gridQuery.HasComp(xform.GridUid) ? _offGridDamping : _airDamping;
                 else
                     friction = _frictionModifier * GetTileFriction(uid, body, xform);