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

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Co-authored-by: Glavo <zjx001202@gmail.com>

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

@@ -83,7 +83,7 @@ public final class Main {
     }
 
     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 final class FXUtils {
         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";
         }