feat: add cross-language semantic contexts for Python, JS/TS, C#, and Java (#996)

tests/fixtures/sample.java

@@ -1,7 +1,11 @@
 import java.util.List;
 import java.util.ArrayList;
 
-public class DataProcessor {
+class BaseProcessor {}
+
+class Result<T> {}
+
+public class DataProcessor extends BaseProcessor implements Processor {
     private List<String> items;
 
     public DataProcessor() {
@@ -16,6 +20,11 @@ public class DataProcessor {
         return validate(items);
     }
 
+    @Override
+    public Result<DataProcessor> build(HttpClient client) {
+        return null;
+    }
+
     private List<String> validate(List<String> data) {
         List<String> result = new ArrayList<>();
         for (String s : data) {