feat(cpp): add CppFileContextBuilder for ObjectiveC

This commit adds a new file `CppFileContextBuilder.kt` in the `cpp/src/main/kotlin/cc/unitmesh/cpp/context` directory. The `CppFileContextBuilder` class implements the `FileContextBuilder` interface and provides the implementation for creating a `FileContext` object for ObjectiveC files. It extracts information such as file name, path, includes, struct likes, and functions from the `OCFile` PSI element. Additionally, the commit modifies the `cc.unitmesh.cpp.xml` file to include the `CppFileContextBuilder` as an extension for ObjectiveC language.

Author: phodal

cpp/src/main/kotlin/cc/unitmesh/cpp/context/CppFileContextBuilder.kt

@@ -0,0 +1,26 @@
+package cc.unitmesh.cpp.context
+
+import cc.unitmesh.devti.context.FileContext
+import cc.unitmesh.devti.context.builder.FileContextBuilder
+import com.intellij.psi.PsiFile
+import com.intellij.psi.util.PsiTreeUtil
+import com.jetbrains.cidr.lang.psi.OCFile
+import com.jetbrains.cidr.lang.psi.OCFunctionDeclaration
+import com.jetbrains.cidr.lang.psi.OCIncludeDirective
+import com.jetbrains.cidr.lang.psi.OCStructLike
+
+
+class CppFileContextBuilder : FileContextBuilder {
+    override fun getFileContext(psiFile: PsiFile): FileContext? {
+        if (psiFile !is OCFile) return null
+
+        val name = psiFile.name
+        val path = psiFile.virtualFile.path
+
+        val includes = PsiTreeUtil.getChildrenOfTypeAsList(psiFile, OCIncludeDirective::class.java)
+        val structLikes = PsiTreeUtil.getChildrenOfTypeAsList(psiFile, OCStructLike::class.java)
+        val functions = PsiTreeUtil.getChildrenOfTypeAsList(psiFile, OCFunctionDeclaration::class.java)
+
+        return FileContext(psiFile, name, path, null, includes, structLikes, functions)
+    }
+}

cpp/src/main/resources/cc.unitmesh.cpp.xml

@@ -7,6 +7,8 @@
     </dependencies>
 
     <extensions defaultExtensionNs="cc.unitmesh">
+        <fileContextBuilder language="ObjectiveC"
+                            implementationClass="cc.unitmesh.cpp.context.CppFileContextBuilder"/>
         <classContextBuilder language="ObjectiveC"
                              implementationClass="cc.unitmesh.cpp.context.CppStructContextBuilder"/>
         <methodContextBuilder language="ObjectiveC"