execute files using github actions

[mgaitan]

A file could be automatically executed onlune passing a cli option shbin --exec ...

if this is given, we trigger a worflow running a proper environment (node, python, etc, selected by the extension) passing the uploaded file as argument. Any asset generated by the execution will be automatically uploaded to the pastebin.

the url to the run should be returned to the console.

It should be possible to reexecute files by url