Add ckbtc

[JohnnyWyles]

Description

ckBTC - Chain Key Bitcoin over Omnity bridge.
Mints as a factory token on Osmosis.
Example transactions:
Omnity explorer: https://explorer.omnity.network/ticket/mxzaz-hqaaa-aaaar-qaada-cai_1799559
Mintscan: https://www.mintscan.io/osmosis/tx/1add35d03774a2cdd230ab94cdccc192f101c228e34d5ec72e74f44b549f9cd3?height=21119871

Checklist

Adding Assets

If adding a new asset, please ensure the following:

• Asset is registered to the Cosmos Chain Registry.
• Add asset to bottom of zone_assets.json.
  • chain_name and base_denom are provided and use values exactly as defined at the Chain Registry.
  • path is provided, and the IBC channel referenced is registered at the Chain Registry (unless native to Osmosis).
  • osmosis_verified is set to false
  • listing_date_time_utc is specified and accurate
  • Optional: transfer_methods, peg_mechanism, override_properties, canonical, categories, where necessary (see README for details).
• I am aware that upgrading an asset to 'verified' status requires an additional PR to this repo (checklist below).