Add warning if current InfiniTime doesn't support BLE FS (#29)

cmd/itctl/firmware.go

@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"github.com/cheggaaa/pb/v3"
+	"github.com/rs/zerolog/log"
 	"github.com/urfave/cli/v2"
 	"go.arsenm.dev/itd/api"
 )
@@ -20,6 +21,7 @@ func fwUpgrade(c *cli.Context) error {
 
 		err = resLoad(c.Context, []string{absRes})
 		if err != nil {
+			log.Error().Msg("Resource loading has returned an error. This can happen if your current version of InfiniTime doesn't support BLE FS. Try updating without resource loading, and then load them after using the `itctl res load` command.")
 			return err
 		}
 	}