Refactor ReleaseType to add displayName, update CreateDeb to use ReleaseType.displayName in .desktop file formatting

Author: Glavo

buildSrc/src/main/java/org/jackhuang/hmcl/gradle/pack/CreateDeb.java

@@ -287,14 +287,14 @@ private String getDesktopInfo() {
         return """
                 [Desktop Entry]
                 Type=Application
-                Name=HMCL
+                Name=%s
                 Comment=Hello Minecraft! Launcher
                 Exec=%s
                 Icon=%s
                 Terminal=false
                 StartupNotify=false
                 Categories=Game;
                 Keywords=mc;minecraft;
-                """.formatted(getLauncherPath(), getIconTargetPath());
+                """.formatted(getCurrentType().getDisplayName(), getLauncherPath(), getIconTargetPath());
     }
 }

buildSrc/src/main/java/org/jackhuang/hmcl/gradle/pack/ReleaseType.java

@@ -23,17 +23,19 @@
 /// priority are intentionally centralized here so `CreateDeb` can stay focused
 /// on archive layout instead of duplicating channel-specific branching.
 public enum ReleaseType {
-    STABLE("stable", "hmcl", 300),
-    DEVELOPMENT("dev", "hmcl-dev", 200),
-    NIGHTLY("nightly", "hmcl-nightly", 100);
+    STABLE("stable", "hmcl", "HMCL", 100),
+    DEVELOPMENT("dev", "hmcl-dev", "HMCL (Beta)", 200),
+    NIGHTLY("nightly", "hmcl-nightly", "HMCL (Nightly)", 300);
 
-    public final String name;
+    private final String name;
     private final String packageName;
+    private final String displayName;
     private final int alternativesPriority;
 
-    ReleaseType(String name, String packageName, int alternativesPriority) {
+    ReleaseType(String name, String packageName, String displayName, int alternativesPriority) {
         this.name = name;
         this.packageName = packageName;
+        this.displayName = displayName;
         this.alternativesPriority = alternativesPriority;
     }
 
@@ -47,6 +49,10 @@ public String getPackageName() {
         return packageName;
     }
 
+    public String getDisplayName() {
+        return displayName;
+    }
+
     /// Priority used when registering the generic `hmcl` alias.
     ///
     /// Higher values win, which keeps `stable` as the default alias target when