Support chinese variant game version detection (not tested)

Also some minor improvements for preparation of installation features.

worthless/installer.py

@@ -1,6 +1,9 @@
 import re
+import appdirs
 from pathlib import Path
 from configparser import ConfigParser
+
+from worthless import constants
 from worthless.launcher import Launcher
 
 
@@ -14,7 +17,10 @@ class Installer:
 
     # https://gitlab.com/KRypt0n_/an-anime-game-launcher/-/blob/main/src/ts/Game.ts#L26
     def _read_version_from_game_file(self):
-        globalgamemanagers = self._gamedir.joinpath("./GenshinImpact_Data/globalgamemanagers")
+        if self._overseas:
+            globalgamemanagers = self._gamedir.joinpath("./GenshinImpact_Data/globalgamemanagers")
+        else:
+            globalgamemanagers = self._gamedir.joinpath("./YuanShen_Data/globalgamemanagers")
         if globalgamemanagers.exists():
             with globalgamemanagers.open("rb") as f:
                 data = f.read().decode("ascii")
@@ -23,10 +29,17 @@ class Installer:
                 raise ValueError("Could not find version in game file")
             return result.group(1)
 
-    def __init__(self, gamedir: str | Path = Path.cwd(), overseas: bool = True):
+    def __init__(self, gamedir: str | Path = Path.cwd(), overseas: bool = True, data_dir: str | Path = None):
         if isinstance(gamedir, str):
             gamedir = Path(gamedir)
         self._gamedir = gamedir
+        if not data_dir:
+            self._appdirs = appdirs.AppDirs(constants.APP_NAME, constants.APP_AUTHOR)
+            self._temp_path = Path(self._appdirs.user_cache_dir).joinpath("Installer")
+        else:
+            if not isinstance(data_dir, Path):
+                data_dir = Path(data_dir)
+            self._temp_path = data_dir.joinpath("Temp/Installer/")
         config_file = self._gamedir.joinpath("config.ini")
         self._config_file = config_file.resolve()
         self._version = None