Handle non-chain Cosmos proposals

Description

Certain Cosmos communities are DAOs or other entities, which are not necessarily chains themselves. Often, when you visit /proposals for these communities, you see onchain proposals that are not relevant.

Example: https://commonwealth.im/ion/proposals loads Osmosis on-chain proposals, but Ion governance is separate from Osmosis governance.

There are even some that default to Osmosis proposals, despite having no relation.

Further discussion is needed to decide how to handle these communities, and clean up the database.

Open Questions: Do we:

build DAO proposal functionality?
Hide the Proposals section (and linking) if not a "chain"?

Engineering Requirements

Acceptance Criteria

Additional context

Other examples:

https://commonwealth.im/wynd-dao/proposals loads osmosis
https://commonwealth.im/capapult/proposals loads osmosis

hicommonwealth / commonwealth