feat: add German (de_DE) localization support and update README

Author: ptthanh02

README.md

@@ -23,13 +23,14 @@
 
 ## Localization
 
-| Language | Locale Code | Contributor | Status |
-|----------|-------------|-------------|--------|
+| Language          | Locale Code | Contributor                                     | Status |
+|-------------------|-------------|-------------------------------------------------|--------|
 | Chinese Simplified | `zh_CN` | [SnowCutieOwO](https://github.com/SnowCutieOwO) | v1.2.3 |
-| English | `en_US` | Core language | Latest |
-| Italian | `it_IT` | [RV_SkeLe](https://github.com/RVSkeLe) | v1.3.5 |
-| Turkish | `tr_TR` | berkkorkmaz | v1.3.5 |
-| Vietnamese | `vi_VN` | [maiminhdung](https://github.com/maiminhdung), [ptthanh02](https://github.com/ptthanh02) | Latest |
+| German            | `de_DE` | [jannispkz](https://github.com/jannispkz)       | Latest |
+| English           | `en_US` | core language                                   | Latest |
+| Italian           | `it_IT` | [RV_SkeLe](https://github.com/RVSkeLe)          | v1.3.5 |
+| Turkish           | `tr_TR` | berkkorkmaz                                     | v1.3.5 |
+| Vietnamese        | `vi_VN` | [ptthanh02](https://github.com/ptthanh02)       | Latest |
 
 ## API
 

core/src/main/java/github/nighter/smartspawner/language/LanguageManager.java

@@ -112,8 +112,7 @@ private void saveDefaultFiles() {
         Map<String, Set<LanguageFileType>> localeFileMap = new HashMap<>();
         localeFileMap.put("vi_VN", EnumSet.allOf(LanguageFileType.class));
         localeFileMap.put("DonutSMP", EnumSet.allOf(LanguageFileType.class));
-        // localeFileMap.put("it_IT", EnumSet.allOf(LanguageFileType.class));
-        // localeFileMap.put("tr_TR", EnumSet.allOf(LanguageFileType.class));
+        localeFileMap.put("de_DE", EnumSet.allOf(LanguageFileType.class));
 
         localeFileMap.forEach((locale, fileTypes) -> {
             fileTypes.forEach(fileType -> {

core/src/main/java/github/nighter/smartspawner/updates/LanguageUpdater.java

@@ -16,7 +16,7 @@ public class LanguageUpdater {
     private final String currentVersion;
     private final SmartSpawner plugin;
     private static final String LANGUAGE_VERSION_KEY = "language_version";
-    private static final List<String> SUPPORTED_LANGUAGES = Arrays.asList("en_US", "vi_VN");
+    private static final List<String> SUPPORTED_LANGUAGES = Arrays.asList("en_US", "vi_VN", "de_DE");
 
     // Track which file types to update
     private final Set<LanguageFileType> activeFileTypes = new HashSet<>();