Binding for toggling window float on top (macOS only)

This adds a keybinding and apprt action for #7237.

macos/Sources/Ghostty/Package.swift

@@ -42,6 +42,28 @@ extension Ghostty {
 // MARK: Swift Types for C Types
 
 extension Ghostty {
+    enum SetFloatWIndow {
+        case on
+        case off
+        case toggle
+
+        static func from(_ c: ghostty_action_float_window_e) -> Self? {
+            switch (c) {
+            case GHOSTTY_FLOAT_WINDOW_ON:
+                return .on
+
+            case GHOSTTY_FLOAT_WINDOW_OFF:
+                return .off
+
+            case GHOSTTY_FLOAT_WINDOW_TOGGLE:
+                return .toggle
+
+            default:
+                return nil
+            }
+        }
+    }
+
     enum SetSecureInput {
         case on
         case off