Replace fatalError with preconditionFailure (#647)

ios/FluentUI.Demo/FluentUI.Demo/Demos/TableViewCellFileAccessoryViewDemoController.swift

@@ -12,7 +12,7 @@ class TableViewCellFileAccessoryViewDemoController: UITableViewController {
     }
 
     required init?(coder: NSCoder) {
-        fatalError("init(coder:) has not been implemented")
+        preconditionFailure("init(coder:) has not been implemented")
     }
 
     override func viewDidLoad() {

ios/FluentUI/Command Bar/CommandBar.swift

@@ -46,7 +46,7 @@ open class CommandBar: UIView {
 
     @available(*, unavailable)
     public required init?(coder: NSCoder) {
-        fatalError("init(coder:) has not been implemented")
+        preconditionFailure("init(coder:) has not been implemented")
     }
 
     /// Apply `isEnabled` and `isSelected` state from `CommandBarItem` to the buttons
@@ -139,7 +139,7 @@ open class CommandBar: UIView {
         itemGroups.map { items in
             CommandBarButtonGroupView(buttons: items.compactMap { item in
                 guard let button = itemsToButtonsMap[item] else {
-                    fatalError("Button is not initialized in commandsToButtons")
+                    preconditionFailure("Button is not initialized in commandsToButtons")
                 }
 
                 return button

ios/FluentUI/Command Bar/CommandBarButton.swift

@@ -50,7 +50,7 @@ class CommandBarButton: UIButton {
 
     @available(*, unavailable)
     required init?(coder: NSCoder) {
-        fatalError("init(coder:) has not been implemented")
+        preconditionFailure("init(coder:) has not been implemented")
     }
 
     func updateState() {

ios/FluentUI/Command Bar/CommandBarButtonGroupView.swift

@@ -24,7 +24,7 @@ class CommandBarButtonGroupView: UIView {
 
     @available(*, unavailable)
     required init?(coder: NSCoder) {
-        fatalError("init(coder:) has not been implemented")
+        preconditionFailure("init(coder:) has not been implemented")
     }
 
     private lazy var stackView: UIStackView = {

ios/FluentUI/SegmentedControl/SegmentPillButton.swift

@@ -48,7 +48,7 @@ class SegmentPillButton: UIButton {
     }
 
     required init?(coder: NSCoder) {
-        fatalError("init(coder:) has not been implemented")
+        preconditionFailure("init(coder:) has not been implemented")
     }
 
     override func layoutSubviews() {

macos/FluentUI/AvatarView/AvatarView.swift

@@ -698,7 +698,7 @@ class BorderView: NSView {
 	}
 
 	required init?(coder: NSCoder) {
-		fatalError("init(coder:) has not been implemented")
+		preconditionFailure("init(coder:) has not been implemented")
 	}
 
 	override func draw(_ dirtyRect: NSRect) {

scripts/removeUnusedResourcesFromAssets.swift

@@ -49,11 +49,11 @@ func findUsedResources(in rootPath: String) -> Set<String> {
 #endif
                         }
                     } catch {
-                        fatalError("Failed to read contents resource file: \(filePath) \nError: \(error)")
+                        preconditionFailure("Failed to read contents resource file: \(filePath) \nError: \(error)")
                    }
                 }
             } catch {
-                fatalError("Failed to retrieve resource file: \(fileURL) \nError: \(error)")
+                preconditionFailure("Failed to retrieve resource file: \(fileURL) \nError: \(error)")
             }
         }
     }