Add subcommand "lfetool info plugins"

Created by: oubiwann

In order to support ticket #76 (getting a list of "commands help" plugins), it would be good to make sure we're filtering from an original list of plugins that actually declare support for lfetool-plugin. To easily get a list of plugins from the command line, we should add a command.

Imported comments:

By oubiwann on 2014-07-05 01:24:50 UTC

Added in 57de0663 and 41cbac7c.

By oubiwann on 2014-07-05 01:26:04 UTC

Note that info plugins is simply calling (lfetool-plugin:get-loaded-plugin-names); it is up to that function to change how plugins are filtered.

By oubiwann on 2014-07-06 00:03:29 UTC

$ lfetool info plugins confirmed working with the following output: (#(plugin "myscript") #(plugin "script") #(plugin "yourscript"))