Refactor code structure for improved readability and maintainability (#473)

* Add ToolTips to Tweaks

Scripts/GUI/GetSystemUsesDarkMode.ps1

@@ -0,0 +1,9 @@
+# Checks if the system is set to use dark mode for apps
+function GetSystemUsesDarkMode {
+    try {
+        return (Get-ItemProperty -Path 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Themes\Personalize' -Name 'AppsUseLightTheme').AppsUseLightTheme -eq 0
+    }
+    catch {
+        return $false
+    }
+}