add yt-dlp version on web

app/main.py

@@ -12,6 +12,7 @@ import json
 import pathlib
 
 from ytdl import DownloadQueueNotifier, DownloadQueue
+from yt_dlp.version import __version__ as yt_dlp_version
 
 log = logging.getLogger('main')
 
@@ -231,6 +232,10 @@ def robots(request):
         )
     return response
 
+@routes.get(config.URL_PREFIX + 'version')
+def version(request):
+    return web.json_response({"version": yt_dlp_version})
+
 if config.URL_PREFIX != '/':
     @routes.get('/')
     def index_redirect_root(request):