jp (ad-hoc): new "list" and "run" commands:

- list just display commands available at ad-hoc entry point. --verbose allows to display values names, which is useful for automation.

- run can either run interactively a command, or execute a workflow to automate them.

frontends/src/jp/base.py

@@ -859,7 +859,7 @@ class CommandAnswering(CommandBase):
 
     to manage action_types answer,
     """
-    action_callbacks = {} # XXX: set managed action types in an dict here:
+    action_callbacks = {} # XXX: set managed action types in a dict here:
                           # key is the action_type, value is the callable
                           # which will manage the answer. profile filtering is
                           # already managed when callback is called