Add support for a non-EVM chain

**Author(s):** Risk Labs **Status:** Proposed **Related Discussions:** (optional) --- ### Summary: Across proposes integrating Across with an additional L1, next to Ethereum. In collaboration with the Across core team, the L1’s team has been working to ensure the [new chain requirement](https://docs.across.to/resources/new-chain-requests) and technical feasibility (more below in the implementation section) regarding the implementation of the bridge adapters. At deployment, we propose the...