describe connector plugins command

[maha-hajja]

Description

describes a specific connector plugin.
the parameters' order in the table is as follows:

1. required params
2. other connector specific params
3. sdk params

example: ./conduit connector-plugin desc builtin:[email protected]

Fixes #2024

Quick checks

• I have followed the Code Guidelines.
• There is no other pull request for the same update/change.
• I have written unit tests.
• I have made sure that the PR is of reasonable size and can be easily reviewed.

[raulb]

I'm approving ahead of time, but I think before we ship the two PRs (this one and #2088), we should:

1. Consolidate the look of all tables so they're consistent (fwiw, I'm ok with the default style since I agree that on describe, it reads better).
2. Hide those fields that are empty.

(Bonus is filing an issue for why author is always empty).