CLI: conduit connector-plugins describe PLUGIN

[raulb]

This command will describe the configuration for that connector plugin.

It does not require having Conduit previously running.

Arguments

Name	Description	Required	Default Value
PLUGIN	connector plugin to describe	Yes

--help

$ conduit connnector-plugins describe PLUGIN

EXAMPLE:

$ conduit connector-plugins describe [email protected]
NAME   DESCRIPTION                       REQUIRED  DEFAULT VALUE  EXAMPLE
url    HTTP URL to send requests to.     true                     https://...

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Part of #1911