Add the ability for msbot get to retrieve items by their type rather than name or Id

[darrenj]

When configuring AppInsights for appSettings.json and configuring Skills we need the ability to easily retrieve the configuration data.

msbot list --bot MYBOT.bot --secret MYSECRET enables us to do this but a lot of information is returned making it hard to get to what you need. Names are dynamic so docs cant provide a copy/paste example.

Ideally we could do: msbot get --type appInsights or msbot get --type luis which would return all services that match the type (e.g. appInsights)