st2client config manager

It would be a cool feature to have the ability to switch between config files in a muti-environment setup. An example is similar to how knife block might work.

Multiple config files inside ~/.st2 folder which are named however you need. Could be prefixed with something like st2client-config. Filename might look something like ~/.st2/st2client-config-<env-name>.ini. Then switching between the configs would just be doing a symlink like knife block does.

Switching configs e.g.

$ st2 config use <env-name>
> Now using <env-name>

Listing the configs e.g.

$ st2 config list
> The available StackStorm servers are
>  <env-name> [ Currently Selected ]
>  <env-name1>
>  <env-name2>
>  <env-name3>

There could even maybe be the option to create/edit them with the cli as well which would drop you into whatever configured editor is.

st2 config {create,edit} <env-name1>

Start at the existing st2 config CLI entry point and inspect how configuration is loaded from ~/.st2. Define how named environment files, the selected configuration, and config use and config list should interact before implementing; treat config create and config edit as optional scope. Done means users can switch among named configurations and list the available one with the current selection shown.