fix: set config file locations for windows, mac, and linux

Author: python357-1

.python-version

@@ -0,0 +1 @@
+3.12.8

tagstudio/src/qt/ts_qt.py

@@ -174,7 +174,12 @@ def __init__(self, backend, args):
             logger.info("Using Config File", path=path)
             self.settings = TSSettings.read_settings(path)
         else:
-            path = Path.home() / ".TagStudio" / "config.toml"
+            path = ""
+            if sys.platform == "win32":
+                path = Path.home() / "AppData" / "Roaming" / "TagStudio" / "config.toml"
+            else:  # "linux" and "darwin" should use the same config directory
+                path = Path.home() / ".config" / "TagStudio" / "config.toml"
+
             self.settings = TSSettings.read_settings(path)
             logger.info(
                 "Config File not specified, using default one",