Stylesheet, that looks more modern/fluent

• More transparent elements

Main page (topbar and footer)	Steam menu
Quick Access menu	Context menu
Settings page

• Enter desktop mode
• Install Decky Loader with CSS Loader
• Download repository as .zip (Code > Download ZIP)
• Unzip modern-steam-main folder and move it to ~/homebrew/themes/ folder
• Enter gaming mode back and enable theme in Quick Access menu