Disable well-known ShellCheck warnings

src/bin/app.skel

 #!/bin/bash
+#shellcheck disable=SC1090,SC2034
 
 . "$(shellfu-get path)" || exit 3
 
-#shellcheck disable=SC2034
 {
     SATURNIN_APP_CODENAME="__MKIT_PROJ_CODENAME__"
     SATURNIN_APP_TAGLINE="__MKIT_PROJ_TAGLINE__"