Add MacOS Style Icon (#3755)

* Add MacOS Style Icon

* MacOS Style Alt Icon

* Scaled Mac Style Icon

* Delete unused icons

* Rename icon

* update

* Optimize icon file

---------

Co-authored-by: Glavo <[email protected]>

Author: ShulkerSakura

HMCL/src/main/java/org/jackhuang/hmcl/Main.java

@@ -83,7 +83,7 @@ public static void exit(int exitCode) {
     }
 
     private static void initIcon() {
-        java.awt.Image image = java.awt.Toolkit.getDefaultToolkit().getImage(Main.class.getResource("/assets/img/icon@8x.png"));
+        java.awt.Image image = java.awt.Toolkit.getDefaultToolkit().getImage(Main.class.getResource("/assets/img/icon-mac.png"));
         AwtUtils.setAppleIcon(image);
     }
 

HMCL/src/main/java/org/jackhuang/hmcl/ui/FXUtils.java

@@ -776,6 +776,8 @@ public static void setIcon(Stage stage) {
         String icon;
         if (OperatingSystem.CURRENT_OS == OperatingSystem.WINDOWS) {
             icon = "/assets/img/icon.png";
+        } else if (OperatingSystem.CURRENT_OS == OperatingSystem.OSX) {
+            icon = "/assets/img/icon-mac.png";
         } else {
             icon = "/assets/img/icon@4x.png";
         }