[Grbl_Esp32 Issue#233] ESPxx commands for SD Delete, Upload, Create Directory

So, i have a feature request.
Apart from some cool web based gcode generator work, I am also adding support for ESP32Grbl to my own host application.
Now as-is I have awesome connectivity over serial and telnet working.
But I noticed some functionality seems to be only available over http
For example:
SD Delete
SD Upload
SD Create Dir
etc
Other functionality over HTTP uses the same command set as serial/telnet so from coding a host perspective its easier to have a function that looks at “how we are connected” and then send the same command, to the relevant interface, than having to deal with very different ways of interface, or even worse, things available on only one of the three interfaces.
So, how can we go about adding some extra [ESP* commands for things like
– Upload SD (Reprap way maybe, ESPxx1 /path/subfolder/FILENAME.GCODE starts upload, we stream the gcode, get OK for each line back so i can use existing flow, send ESPxx2 when upload is done for example)
– Delete from SD (ESPxxx3 PATH/FILENAME.GCODE for example)
– Create Directory etc