* Add a barebones common crate
* Refactor some code into the common crate
* Add a `ResolverApi` interface.
This commit adds a `ResolverApi` trait to the `format` crate that can be
implemented by any type that can act as a resolver. A resolver is able
to provide information on the chain state. This chain state could be
fresh or it could be cached (which is something that we will do in a
future PR).
This cleans up our crate graph so that `format` is not depending on the
node interactions crate for the `EthereumNode` trait.
* Cleanup the blocking executor
* Add support for wrapper types
* Move `FilesWithExtensionIterator` to `core::common`
* Remove unneeded use of two `HashMap`s
* Make metadata structs more typed
* Impl new_from for wrapper types
* Implement the new input handling logic
* Fix edge-case in input handling
* Ignore macro doc comment tests
* Correct comment
* Fix edge-case in deployment order
Omar