feat: search pagination

adds support for getting past the first page of search results

ythdd_extractor.py

@@ -357,14 +357,19 @@ def browseChannel(ucid: str, params: str = None, ctoken: str = None):
 
 	return response_json
 
-def WEBextractSearchResults(search_query: str) -> list:
+def WEBextractSearchResults(search_query: str, page: int) -> list:
 	# Posts a search request to innertube API
 	# and processes only the relevant part (the actual results)
 
 	if search_query is None:
 		return []
 
-	web_context = makeWebContext({"query": search_query})
+	additional_context = {"query": search_query}
+	if page is not None:
+		params = ythdd_proto.produceSearchParams(page)
+		additional_context["params"] = params
+
+	web_context = makeWebContext(additional_context)
 	response = requests.post('https://www.youtube.com/youtubei/v1/search', 
 		params={"prettyPrint": False}, 
 		headers=stage2_headers,