feat(deck): Add option to disable SteamOS-BTRFS

Author: KyleGospo

system_files/deck/usr/share/ublue-os/firstboot/yafti.yml

@@ -88,6 +88,11 @@ screens:
           default: true
           packages:
             - Setup Theme: just setup-theme
+        Use EXT4 for SD Cards:
+          description: Disable BTRFS support for SD cards for direct compatibility with SD cards formatted on stock SteamOS (Not recommended).
+          default: false
+          packages:
+          - Switch SteamOS-BTRFS config to EXT4: just --unstable switch-to-ext4
         Wallpaper Engine:
           description: Enables Wallpaper Engine
           default: true

system_files/deck/usr/share/ublue-os/just/custom.just

@@ -94,6 +94,9 @@ resize-deckswap:
     just resize-deckswap
   fi
 
+switch-to-ext4:
+  just --unstable _auth | sudo sed -i 's@STEAMOS_BTRFS_SDCARD_FORMAT_FS="btrfs"@STEAMOS_BTRFS_SDCARD_FORMAT_FS="ext4"@g' /etc/default/steamos-btrfs
+
 zram-on:
   #!/usr/bin/env bash
   KARGS=$(rpm-ostree kargs)