Add 'Conda Community' section from the conda wiki

[ForgottenProgramme]

This info has been taken from the Conda Community page of the conda wiki. It has been written by John A. Kirkham

Description

Checklist - did you ...

• [ ] Add a file to the news directory (using the template) for the next release's release notes?
• [ ] Add / update necessary tests?
• [ ] Add / update outdated documentation?

[conda-bot]

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[jezdez]

I'm wondering if this is something we could solve on the future conda.org better, the information is definitely useful. @ForgottenProgramme I would suggest to keep this open until then. What do you think?

[ForgottenProgramme]

Closing this now that we have the conda.org website.