refactor(annotation): Deprecate descriptionI18nKey in favor of new localization approach

- Add @deprecated annotation to descriptionI18nKey() in multiple annotations
- This change paves the way for a new localization solution

Author: codeboyzhou

src/main/java/com/github/codeboyzhou/mcp/declarative/annotation/McpJsonSchemaDefinitionProperty.java

@@ -14,6 +14,7 @@
 
     String description() default StringHelper.EMPTY;
 
+    @Deprecated
     String descriptionI18nKey() default StringHelper.EMPTY;
 
     boolean required() default false;

src/main/java/com/github/codeboyzhou/mcp/declarative/annotation/McpPrompt.java

@@ -17,6 +17,7 @@
 
     String description() default StringHelper.EMPTY;
 
+    @Deprecated
     String descriptionI18nKey() default StringHelper.EMPTY;
 
 }

src/main/java/com/github/codeboyzhou/mcp/declarative/annotation/McpPromptParam.java

@@ -17,6 +17,7 @@
 
     String description() default StringHelper.EMPTY;
 
+    @Deprecated
     String descriptionI18nKey() default StringHelper.EMPTY;
 
     boolean required() default false;

src/main/java/com/github/codeboyzhou/mcp/declarative/annotation/McpResource.java

@@ -19,6 +19,7 @@
 
     String description() default StringHelper.EMPTY;
 
+    @Deprecated
     String descriptionI18nKey() default StringHelper.EMPTY;
 
     String mimeType() default "text/plain";

src/main/java/com/github/codeboyzhou/mcp/declarative/annotation/McpTool.java

@@ -17,6 +17,7 @@
 
     String description() default StringHelper.EMPTY;
 
+    @Deprecated
     String descriptionI18nKey() default StringHelper.EMPTY;
 
 }

src/main/java/com/github/codeboyzhou/mcp/declarative/annotation/McpToolParam.java

@@ -14,6 +14,7 @@
 
     String description() default StringHelper.EMPTY;
 
+    @Deprecated
     String descriptionI18nKey() default StringHelper.EMPTY;
 
     boolean required() default false;