Add ERC: Verification-independent Cross-Chain Messaging

[nambrot]

This ERC specifies an API for sending messages across chains to enable interoperability in the greater Ethereum ecosystem (but is flexible enough to encompass alternate VMs). It specifically is capable of sending messages via arbitrary transport and verifying them via diverse mechanisms. At the same time, it aims to provide enough standardization with a modular relaying mechanism to provide a consistent developer experience. As such, it allows for a clean separation of high level abstractions to be built by “application developers” like cross-chain tokens and account abstraction, while allowing for innovation at the verification and transport layer.

[eip-review-bot]

File ERCS/erc-7854.md

Requires 1 more reviewers from @g11tech, @samwilsn, @xinbenlv

[github-actions[bot]]

The commit 0f0cf2c1b7a1f110c4347c295611ec62b06e58ea (as a parent of e2ce462fcdc50544a4bcc8fa01c339d00e9209d6) contains errors. Please inspect the Run Summary for details.