feat(ujust): Add setup-boot-windows-steam ujust script

* Adds a ujust script for making a steam shortcut that boots into Windows on dual-boot setups

system_files/desktop/shared/usr/share/ublue-os/just/86-bazzite-windows.just

@@ -0,0 +1,17 @@
+# vim: set ft=make :
+
+# Adds a script in Steam to boot Windows which is useful for dual-boot setups
+setup-boot-windows-steam:
+    #!/usr/bin/bash
+
+    echo "Making ~/boot-windows.sh script"
+    echo "#!/usr/bin/bash" | tee ~/boot-windows.sh
+    echo 'boot_number=$(echo $(efibootmgr) | grep -Po "(?<=Boot)\S{4}(?=( |\* )Windows)")' | tee -a ~/boot-windows.sh
+    echo 'sudo efibootmgr -n "${boot_number}" && reboot' | tee -a ~/boot-windows.sh
+    chmod +x ~/boot-windows.sh
+
+    echo "Making efibootmgr -n accessible without sudo"
+    echo "%wheel ALL=(root) NOPASSWD: /usr/sbin/efibootmgr" | sudo tee /etc/sudoers.d/efibootmgr-config
+
+    echo "Adding ~/boot-windows.sh as a Non-steam game"
+    /usr/bin/steamos-add-to-steam ~/boot-windows.sh