fix: InterestManagement Awake

- Don't check for active server or client
- static `aoi` must always be set

fix: NetworkManagerHUD use NetworkManager.singleton

fix: RuntimeInitializeOnLoadMethod BeforeSceneLoad

- RuntimeInitializeLoadType.BeforeSceneLoad is requred so methods with this attribute fire BEFORE Awake

fix: Fixed PlayerCamera scripts in examples

- can't unparent camera in OnDisable
- Player may be in a subscene so put camera in active scene after unparenting so it's not lost if additive is unloaded.
- Moving player object between subscenes unexpectedly fires OnDisable & OnEnable...who knew?

syntax

fix: NetworkStartPosition use Start instead of Awake

- NetworkManager::ResetStatics fires after scene object's MonoB.Awake and wipes the static list

fix: moved MirrorIcon to Editor folder

- excludes it from builds

syntax

feat: Reader Writer support for Sprite (MirrorNetworking#3034)

fix: Use IsNullOrWhiteSpace instead of IsNullOrEmpty (MirrorNetworkin…

…g#3033)

- IsNullOrWhiteSpace covers null, empty, and just whitespace.