[Feature] Integrate `marlin`

[taichi-ishitani]

https://github.com/ethanuppal/dumbname

This library is to write test code in Rust for Verilated Verilog code. I think this library is useful for Veryl's inline test code feature.

[dalance]

The project name was decided marlin.

[dalance]

https://github.com/ethanuppal/marlin/pull/57

[ethanuppal]

It should be as simple as veryl build && cargo test! You can make veryl test run those commands.