Support Aleph Zero Bridging Routes

**Author(s):** Across **Status:** Proposed **Related Discussions:** https://forum.across.to/t/support-aleph-zero-bridging-routes/2001 --- ### Summary: The Aleph Zero core team proposes the integration of Across to Aleph Zero. In collaboration with the Across core team, the Aleph Zero team has been working to ensure the new chain requirement and technical feasibility (more below in the implementation section) regarding the implementation of the bridge adapters. At deployment, we propose the...