Add xterm.js in shell command

[kirtangajjar]

As we've now added shell command, It would be a nice feature enhancement to access shell in browser. It would be useful when we don't have access to our usual dev environment and would like to access shell of website anyways.

It should be included in admin tools like example.com/ee-admin/webshell.

We might need a node server script to handle backend of xterm frontend in browser. A demo is already included in xterm which can be used (mostly) unchanged.

[michacassola]

What about an filemanager at example.com/ee-admin/files to replace any SFTPing?

[kirtangajjar]

@michacassola Cool idea. Although additional admin tools aren't a priority now, we'll surely look into it later when we're focusing on adding more tools.

Also since it's a bit different from my original issue, I suggest you open another issue for it (so both of the issues can be tracked separately).

[michacassola]

PS: I use webmin for now on the server to have a file manager (with GUI text editing) and a basic shell (the webmin team does not know yet how fast an interactive sheel will be implemented). So for now this should be ok to use. I do not notice any conflicts with EE with a minimal webmin installation.