feat: loading screen (#427)

* Added loading screen

* Added SceneLoaderWrapper to control the loading screen

Co-authored-by: Fernando Cortez <[email protected]>
Co-authored-by: Sam Bellomo <[email protected]>

Author: 3 people

Assets/BossRoom/Prefabs/SceneLoader.prefab

@@ -0,0 +1,75 @@
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