yt-dlp: expose optional-dependencies

This is required so that other packages, that want to consume them can
resolve them.

pkgs/by-name/yt/yt-dlp/package.nix

@@ -30,17 +30,25 @@ python3Packages.buildPythonApplication rec {
     hatchling
   ];
 
-  dependencies = with python3Packages; [
-    brotli
-    certifi
-    curl-cffi
-    mutagen
-    pycryptodomex
-    requests
-    secretstorage # "optional", as in not in requirements.txt, needed for `--cookies-from-browser`
-    urllib3
-    websockets
-  ];
+  # expose optional-dependencies, but provide all features
+  dependencies = lib.flatten (lib.attrValues optional-dependencies);
+
+  optional-dependencies = {
+    default = with python3Packages; [
+      brotli
+      certifi
+      mutagen
+      pycryptodomex
+      requests
+      urllib3
+      websockets
+    ];
+    curl-cffi = [ python3Packages.curl-cffi ];
+    secretstorage = with python3Packages; [
+      cffi
+      secretstorage
+    ];
+  };
 
   pythonRelaxDeps = [ "websockets" ];