Restructure to keep __main__ free to be used when using codegen as part

of another project

codegen/__main__.py

@@ -1,6 +1,6 @@
-from .codegen import test_str8, test_doubly_linked_list, test_typed_array
+def main():
+    pass
+
 
 if __name__ == "__main__":
-    test_str8()
-    test_typed_array()
-    test_doubly_linked_list()
+    main()

codegen/dev_main.py

@@ -0,0 +1,6 @@
+from .codegen_example import test_str8, test_doubly_linked_list, test_typed_array
+
+if __name__ == "__main__":
+    test_str8()
+    test_typed_array()
+    test_doubly_linked_list()

run

@@ -1,3 +1,3 @@
 #!/bin/bash
 
-python3 -m codegen
+python3 -m codegen.dev_main