Allow self-hosted organizations to be listed in communities directory

[alya]

Following up on #15844, we should make it possible for self-hosted organizations to opt in to be listed in the Zulip communities directory (https://zulip.com/communities/).

[zulipbot]

Hello @zulip/server-misc, @zulip/server-settings members, this issue was labeled with the "area: settings (admin/org)", "area: portico" labels, so you may want to check it out!

[alya]

Marked as "feedback wanted", as upvotes on this issue will increase its priority.

[neilg2001]

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[rithivaithyanathan]

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[zulipbot]

Hello @neilg2001, it looks like you've currently claimed 1 issue in this repository. We encourage new contributors to focus their efforts on at most 1 issue at a time, so please complete your work on your other claimed issues before trying to claim this issue again.

We look forward to your valuable contributions!

[rithivaithyanathan]

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[rithivaithyanathan]

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[neilg2001]

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[neilg2001]

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@neilg2001 You have been unassigned from this issue because you have not made any updates for over 14 days. Please feel free to reclaim the issue if you decide to pick up again. Thanks!