- add flatpak extension installer GUI for adding the extensions, configuring your installed flatpaks, and examples on how to add the hook into the target args in steam:


- auto uninstall flatpak extensions on plugin uninstall, similar to how lsfg-vk layer is removed on uninstall event. You will have to go into flatpak modal and re-install extensions if you update the plugin for now (dont want to auto install those just yet)
thanks to this reddit post for the inspo and well documented steps: https://www.reddit.com/r/SteamDeck/comments/1nhnfsd/guide_how_to_use_deckylsfgvk_properly_with/
UI is still a bit janky, but any testing would be greatly appreciated!