Swift Testing for Unit Tests PART 1 (#5119)

* migrated a lot of unit tests to Swift Testing and added a new implementation for deferred fulfillment

more tests migration

Cleaned the code manually to establish some good patterns

more code improvements

some more code improvements

removed empty tests

update project

* more pr suggestions and cleanups

* removed the TestSetup pattern

* fixing claude not reusing tests

* pr suggestion + added indent rule to swiftformat so that we can prevent AIs to change that

UnitTests/Sources/JoinRoomScreenViewModelTests.swift

@@ -38,7 +38,7 @@ class JoinRoomScreenViewModelTests: XCTestCase {
         clientProxy = nil
         AppSettings.resetAllSettings()
     }
-
+    
     func testInteraction() async throws {
         XCTAssertTrue(appSettings.seenInvites.isEmpty, "There shouldn't be any seen invites before running the tests.")