[chuni] Add auto version matching

src/main/java/icu/samnyan/aqua/sega/util/AquaConst.java

@@ -0,0 +1,8 @@
+package icu.samnyan.aqua.sega.util;
+
+public class AquaConst {
+    public static String SERIAL_KEY = "CLIENT_ID";
+    public static String VERSION_KEY = "ROM_VERSION";
+    public static String CHUNI_DEFAULT_VERSION = "1.30";
+    public static String DEFAULT_KEYCHIP_ID = "A69E01A8888";
+}

src/main/java/icu/samnyan/aqua/sega/util/VersionUtil.java

@@ -0,0 +1,25 @@
+package icu.samnyan.aqua.sega.util;
+
+public class VersionUtil {
+
+    public static String getTargetVersion(String savedVersion, String currentVersion) {
+        var v1s = savedVersion.split("\\.");
+        var v2s = currentVersion.split("\\.");
+        try {
+            for (int i = 0; i < v1s.length; i++) {
+                int v1n = Integer.parseInt(v1s[i]);
+                int v2n = Integer.parseInt(v2s[i]);
+                if (v1n > v2n) {
+                    return currentVersion;
+                }
+                if (v1n < v2n) {
+                    return savedVersion;
+                }
+            }
+            // if all same
+            return savedVersion;
+        } catch (Exception e) {
+            return savedVersion;
+        }
+    }
+}