Core: limit parallel APContainer writing (#2443)

Co-authored-by: black-sliver <59490463+black-sliver@users.noreply.github.com>

worlds/Files.py

@@ -2,11 +2,18 @@ from __future__ import annotations
 
 import json
 import zipfile
+import os
+import threading
 
 from typing import ClassVar, Dict, Tuple, Any, Optional, Union, BinaryIO
 
 import bsdiff4
 
+semaphore = threading.Semaphore(os.cpu_count() or 4)
+
+del threading
+del os
+
 
 class AutoPatchRegister(type):
     patch_types: ClassVar[Dict[str, AutoPatchRegister]] = {}
@@ -57,8 +64,9 @@ class APContainer:
         zip_file = file if file else self.path
         if not zip_file:
             raise FileNotFoundError(f"Cannot write {self.__class__.__name__} due to no path provided.")
-        with zipfile.ZipFile(zip_file, "w", self.compression_method, True, self.compression_level) \
-                as zf:
+        with semaphore:  # TODO: remove semaphore once generate_output has a thread limit
+            with zipfile.ZipFile(
+                    zip_file, "w", self.compression_method, True, self.compression_level) as zf:
                 if file:
                     self.path = zf.filename
                 self.write_contents(zf)