Prefire compatibility with Xcode 15 (#1773)

* xcode ready solution

* now the previews won't fail but get generated

* delay in some screens that require a waiting state (the bloom does not work in previews)

* better code

* longer delay

removed and redone lfs

readded as lfs

UnitTests/SupportingFiles/target.yml

@@ -49,8 +49,6 @@ targets:
 
     sources:
     - path: ../Sources
-      excludes:
-        - "**/__Snapshots__/**"
     - path: ../SupportingFiles
     - path: ../../ElementX/Sources/Other/InfoPlistReader.swift
     - path: ../../Tools/Scripts/Templates/SimpleScreenExample/Tests/Unit