* Removed SnapGridOffset, there is only center now.
* SnapGridComponent methods are now static.
* Removed SnapGridComponent.OnPositionChanged.
* Refactored static functions off SnapGridComponent to MapGrid.
Refactored away usages of SnapGridComponent.Position.
* Added Transform.Anchored for checking if an entity is a tile entity.
More refactoring for static MapGrid functions.
* Static snapgrid methods on MapGrid are no longer static.
* Add setter to ITransformComponent.Anchored.
Removed direct references to SnapGridComponent from content.
* Grid functions now deal with EntityUids instead of SnapGridComponents.
Began renaming public API functions from SnapGrid to Anchor.
* Remove the SnapGridComponent 'Offset' field from all yaml files. This was removed in code previously, so the yaml linter was upset.
* Update engine submodule to v0.4.46.
