Add missing json_parser.py and add alternative requirements

This adds fix_and_parse_json
Also, add requirements-alternative.txt to help install reqs in a different environment

scripts/json_parser.py

@@ -0,0 +1,12 @@
+import dirtyjson
+from ai_functions import fix_json
+
+def fix_and_parse_json(json_str: str, try_to_fix_with_gpt: bool = True):
+    try:
+        return dirtyjson.loads(json_str)
+    except Exception as e:
+        if try_to_fix_with_gpt:
+          # Now try to fix this up using the ai_functions
+          return fix_json(json_str, None, True)
+        else:
+          raise e