feat(merlin): Add support for Merlin EVM chain

[satoshiotomakan]

Description

Add support for Merlin EVM chain: https://merlinchain.io/

How to test

Run C++, Rust, iOS, Android tests

Checklist

• Create pull request as draft initially, unless its complete.
• Add tests to cover changes as needed.
• Update documentation as needed.
• If there is a related Issue, mention it in the description.

If you're adding a new blockchain

• I have read the guidelines for adding a new blockchain.

[github-actions]

Binary size comparison

➡️ aarch64-apple-ios:

- 11.34 MB
+ 11.34 MB 	 +1 KB

➡️ aarch64-apple-ios-sim:

- 11.34 MB
+ 11.34 MB 	 +1 KB

➡️ aarch64-linux-android:

- 14.59 MB
+ 14.59 MB 	 +1 KB

➡️ armv7-linux-androideabi:

- 12.27 MB
+ 12.27 MB 	 +1 KB

➡️ wasm32-unknown-emscripten:

- 10.08 MB
+ 10.08 MB 	 +1 KB