Support Blast Chain Bridge Routes

**Author(s):** Blast & Across **Status:** Proposed --- ### Proposal Overview: The Blast core team proposes the integration of Across to Blast. In collaboration with the Across core team, the Blast 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 following route[s] be enabled: Token[s]: ETH, WETH, WBTC, DAI Route: Supported Chains...