[Feature]: Add Opstack superchain registry support for genesis files

[18aaddy]

Resolves #14240

[mattsse]

great

next step is to configure a directory manager that is responsible for writing and reading the files from disk because we don't want to do this everytime the program launches

this can be a simple struct that wraps some path that represents the directory, where we

1. store the dictionary
2. the genesis files

features we need are:
read genesis by name, if missing download
update dictionary + genesis files

layout should be similar to the registry repository
grouped by sepolia,mainnet

path can be something like this

reth/crates/node/core/src/dirs.rs

Lines 17 to 22 in 14a51b5

	/// Returns the path to the reth data directory.
	///
	/// Refer to [`dirs_next::data_dir`] for cross-platform behavior.
	pub fn data_dir() -> Option<PathBuf> {
	dirs_next::data_dir().map(|root| root.join("reth"))
	}

like op-reth-registry for example

[mattsse]

this should use workspace

[mattsse]

we should convert the base paths into constants

[mattsse]

cool, these functions just need some docs