add language metadata field (#482)

Author: clavedeluna

src/codemodder/codemods/base_codemod.py

@@ -34,6 +34,7 @@ class Metadata:
     references: list[Reference] = field(default_factory=list)
     description: str | None = None
     tool: ToolMetadata | None = None
+    language: str = "python"
 
 
 @dataclass
@@ -95,9 +96,13 @@ def docs_module_path(self) -> str: ...
     def name(self) -> str:
         return self._metadata.name
 
+    @property
+    def language(self) -> str:
+        return self._metadata.language
+
     @property
     def id(self) -> str:
-        return f"{self.origin}:python/{self.name}"
+        return f"{self.origin}:{self.language}/{self.name}"
 
     @property
     def summary(self):