Fallback to json5 loader if json.loads cannot parse complex json str

JSON5 spec is more flexible, try to load using a fast json5 parser if
the stricter json.loads from the standard library can't load the
raw complex json string into a python dictionary/list

pyproject.toml

@@ -88,6 +88,7 @@ dependencies = [
     "anthropic == 0.26.1",
     "docx2txt == 0.8",
     "google-generativeai == 0.8.3",
+    "pyjson5 == 1.6.7",
 ]
 dynamic = ["version"]