voyager libraries improvements

[benluelo]

voyager-message is currently very monolothic. it should be split into a few separate parts:

• voyager-core: various types used throughout the voyager stack (i.e ChainId, IbcInterface, ClientInfo, etc). this will be depended on by all other libraries.

  • feat(voyager): split out voyager-core #2999

• voyager-sdk: library used by plugin and module authors. potentially split this up further to voayger-module-sdk and voyager-plugin-sdk, depending on the design we land on for plugins and modules (see split voyager plugins and modules #2996). this will mostly be re-exports as well as some helper types.

• voyager-message: actual voyager message types (i.e. Data, Call, Callback) and all the interfaces and implementations required for that directly.

• voyager-rpc: contains the definition of the main VoyagerRpc trait.

• another library that contains the plugin and module child process spawning and connectivity logic (voyager-supervisor? voyager-executor?)