feat: support for "trending" playlists (without authors)

also introduces a fix for text run parsing (by forcing obj to be a dict)

ythdd_struct_parser.py

@@ -471,6 +471,8 @@ def extractTextFromSimpleOrRuns(obj: dict, default: str = "") -> str:
 	# Extracts the text both from "runs" and "simpleText"
 	# with failsafe to default.
 	text = default
+	if not isinstance(obj, str):
+		return default
 	if "runs" in obj:
 		text = runsToText(obj["runs"])
 	elif "simpleText" in obj: