refactor: Clean up & fix old code

Other changes:
- Renamed "getShortsWatchItem" to "getShortsVideoInfo".
- Fixed `ShortFormVideoInfo`. This never worked for me ever since it was introduced. Turned out it was just implemented incorrectly.
- Moved `basic_info` extraction to `MediaInfo`. Less of a pain to maintain as we only have to modify one file.
- Removed unneeded tsdoc comments.
- Fixed `Innertube#getStreamingData()`. Now it actually returns a deciphered format.
- Simplified some types.

src/parser/parser.ts

@@ -311,14 +311,6 @@ export function parseResponse<T extends IParsedResponse = IParsedResponse>(data:
   }
   _clearMemo();
 
-  _createMemo();
-  const entries = parse(data.entries);
-  if (entries) {
-    parsed_data.entries = entries;
-    parsed_data.entries_memo = _getMemo();
-  }
-  _clearMemo();
-
   applyMutations(contents_memo, data.frameworkUpdates?.entityBatchUpdate?.mutations);
 
   if (on_response_received_endpoints_memo) {
@@ -481,6 +473,29 @@ export function parseResponse<T extends IParsedResponse = IParsedResponse>(data:
     parsed_data.engagement_panels = engagement_panels;
   }
 
+  if (data.playerResponse) {
+    const player_response = parseResponse(data.playerResponse);
+    parsed_data.player_response = player_response;
+  }
+
+  if (data.watchNextResponse) {
+    const watch_next_response = parseResponse(data.watchNextResponse);
+    parsed_data.watch_next_response = watch_next_response;
+  }
+
+  if (data.cpnInfo) {
+    const cpn_info = {
+      cpn: data.cpnInfo.cpn,
+      cpn_source: data.cpnInfo.cpnSource
+    };
+
+    parsed_data.cpn_info = cpn_info;
+  }
+
+  if (data.entries) {
+    parsed_data.entries = data.entries.map((entry) => new NavigationEndpoint(entry));
+  }
+
   return parsed_data;
 }