Move general-purpose crates to separate repositories

[mversic]

This will have multiple benefits:

• improve logical organization of the code and separate concerns
• give great tools to the community that came out of iroha development
• increase visibility of soramitsu and iroha in the eyes of the public

The following crates should be moved to separate repositories:

• iroha_config_base with iroha_config_base_derive
• iroha_wasm_codec with iroha_wasm_codec_derive
• iroha_ffi with iroha_ffi_derive
• const_vec
• conststr
• iroha_crypto (declare it a successor of Ursa in the docs)
• iroha_wasm_test_runner (fork it from iroha_wasm_test_runner and apply the change in a separate commit, notify the original author)

The following crates can also be argued to be moved to separate repos:

• iroha_version with iroha_version_derive
• iroha_schema and iroha_schema_derive
• iroha_wasm_builder
• iroha_numeric

Don't publish these crates:

• riffle_iter (equivalent to itertools::interleave so no need to publish)

Important considerations

1. All the crates should initially be versioned as 0.x.x to be able to make breaking changes. We want to see how they will grow before making a 1.x.x release.
2. We want to keep commit history of the crates when moving them to separate repositories
3. Consider renaming some of the crates. Preferably come up with Japanese terms

[nxsaken]

All the crates should initially be versioned as 0.x.x to be able to make breaking changes.

We can't do it in a uniform way because the existing iroha crate has already been published (and yanked). We agreed to publish it starting from 2.0.0, and having different versioning schemes would be complicated. I do agree that general-purpose crates like conststr can be published from 0.x.x. Eh, maybe it's fine

[mversic]

We can't do it in a uniform way because the existing iroha crate has already been published (and yanked).

I don't understand what this has to do with anything.

I do agree that general-purpose crates like conststr can be published from 0.x.x.

I specifically pulled these crates out because I consider them all general-purpose and not specifically related to iroha. They should be considered separate projects and have separate versioning. This is why I proposed to pull them into separate repositories so that other projects can use them as dependencies. Don't let the iroha_ prefix of these crates kid you, prefix should be removed when moving them into separate repos

[nxsaken]

Created repo stubs:

• https://github.com/hyperledger-iroha/iroha-config-base (find a better name)
• https://github.com/hyperledger-iroha/iroha-wasm-codec
• https://github.com/hyperledger-iroha/iroha-ffi
• https://github.com/hyperledger-iroha/const-vec (has nothing to do with Rust's const)
• https://github.com/hyperledger-iroha/const-str (has nothing to do with Rust's const)
• https://github.com/hyperledger-iroha/iroha-crypto
• https://github.com/hyperledger-iroha/iroha-wasm-test-runner (fork of https://github.com/matklad/webassembly-test)