Discord updates

• Removed deprecated ! commands and related discord intents
• Added /update command to discord integration for gameserver updates
• Added /command [command] to discord integration, allows running SSCM commands from discord

General improvements

• Added language switchers to setup and config pages
• Removed unused config.CustomDetection struct (spotted by @mitoskalandiel)
• Added missing translations
• Added os check to not print misleading windows logger error on linux systems
• Added 30 more seconds of warn messages to AutoRestart (requested by @nam)
• optimized banner image to use webp