fix(service): modify JavaWriteTestService to use JavaLanguage

The JavaWriteTestService in the service package has been modified to use the JavaLanguage class instead of the deprecated Language class. This change ensures compatibility with the latest version of IntelliJ IDEA.

Author: phodal

java/src/main/kotlin/cc/unitmesh/idea/service/JavaWriteTestService.kt

@@ -2,10 +2,10 @@ package cc.unitmesh.idea.service
 
 import cc.unitmesh.devti.context.ClassContext
 import cc.unitmesh.devti.context.ClassContextProvider
-import cc.unitmesh.devti.provider.context.TestFileContext
 import cc.unitmesh.devti.provider.WriteTestService
+import cc.unitmesh.devti.provider.context.TestFileContext
 import com.intellij.execution.configurations.RunProfile
-import com.intellij.lang.Language
+import com.intellij.lang.java.JavaLanguage
 import com.intellij.openapi.application.ReadAction
 import com.intellij.openapi.application.runReadAction
 import com.intellij.openapi.command.WriteCommandAction
@@ -27,7 +27,7 @@ class JavaWriteTestService : WriteTestService() {
     }
 
     override fun isApplicable(element: PsiElement): Boolean {
-        return element.language == Language.findLanguageByID("JAVA")
+        return element.language is JavaLanguage
     }
 
     override fun findOrCreateTestFile(sourceFile: PsiFile, project: Project, element: PsiElement): TestFileContext? {