fix(env): 🐛 Update Shaka-Packager binary retrieval method

* Changed the binary retrieval for `Shaka-Packager` to use `find_binary` for improved accuracy.
* This ensures the correct binary is located and used in the environment checks.

unshackle/commands/env.py

@@ -45,7 +45,7 @@ def check() -> None:
         {"name": "CCExtractor", "binary": "ccextractor"},
         {"name": "FFMpeg", "binary": "ffmpeg"},
         {"name": "MKVToolNix", "binary": "mkvmerge"},
-        {"name": "Shaka-Packager", "binary": packager_dep},
+        {"name": "Shaka-Packager", "binary": find_binary("shaka-packager", "packager", packager_dep)},
         {"name": "N_m3u8DL-RE", "binary": find_binary("N_m3u8DL-RE", "n-m3u8dl-re")},
         {"name": "Aria2(c)", "binary": "aria2c"},
     ]

unshackle/core/proxies/surfsharkvpn.py

@@ -1,6 +1,6 @@
 import json
-import re
 import random
+import re
 from typing import Optional
 
 import requests