use rarfile on windows instead of zipfile

tweaks/posterboard_tweak.py

@@ -1,5 +1,6 @@
 import os
 import zipfile
+import rarfile
 import uuid
 import re
 from random import randint
@@ -182,7 +183,16 @@ class PosterboardTweak(Tweak):
         for tendie in self.tendies:
             zip_output = os.path.join(output_dir, str(uuid.uuid4()))
             os.makedirs(zip_output)
-            with zipfile.ZipFile(tendie.path, 'r') as zip_ref:
-                zip_ref.extractall(zip_output)
+            if os == 'nt':
+                rar_archive = rarfile.RarFile(tendie.path)
+                try:
+                    # Extract the contents to the target directory
+                    rar_archive.extractall(path=zip_output)
+                finally:
+                    # Close the RAR file to release resources
+                    rar_archive.close()
+            else:
+                with zipfile.ZipFile(tendie.path, 'r') as zip_ref:
+                    zip_ref.extractall(zip_output)
         # add the files
         self.recursive_add(files_to_restore, curr_path=output_dir)