ENH, Implement comment moderation tools

[NewJerseyStyle]

Problem:
maintain a constructive environment and manage user-submitted content according to community guidelines

Suggested solution:
Provide administrators with moderation tools. Options should include:

1. Post-moderation: Statements are visible immediately but can be removed by moderators later.
2. Pre-moderation (Strict moderation): Statements require administrator approval before becoming visible.

Alternative suggestions:

• No moderation capabilities.
• Only pre-moderation or only post-moderation.

Additional context:
Pol.is defaults to post-moderation.