feat: Add new IDE service methods

- Implement get_diagnostics_in_range for code diagnostics
- Add get_collapsed_code method for code folding
- Introduce get_extension_tools_path for tool path retrieval

devchat/ide/service.py

@@ -146,3 +146,33 @@ def get_selected_range(self) -> LocationWithText:
         if self.ide_name() == "vscode":
             return selected_range()
         return IdeaIDEService().get_selected_range()
+
+    @rpc_method
+    def get_diagnostics_in_range(self, fileName: str, startLine: int, endLine: int) -> List[str]:
+        """
+        Retrieves diagnostics for a specific range of code in the current IDE.
+        
+        Returns:
+            A list of diagnostic messages for the specified range.
+        """
+        return self._result
+
+    @rpc_method
+    def get_collapsed_code(self, fileName: str, startLine: int, endLine: int) -> str:
+        """
+        Retrives collapsed code exclude specfic range of code in the current IDE.
+
+        Returns:
+            The collapsed code.
+        """
+        return self._result
+
+    @rpc_method
+    def get_extension_tools_path(self) -> str:
+        """
+        Retrives extension tools path.
+
+        Returns:
+            The extension tools path.
+        """
+        return self._result