Add a common crate (#75)

* 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

crates/common/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "revive-dt-common"
+description = "A library containing common concepts that other crates in the workspace can rely on"
+version.workspace = true
+authors.workspace = true
+license.workspace = true
+edition.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+
+[dependencies]
+anyhow = { workspace = true }
+futures = { workspace = true }
+tracing = { workspace = true }
+once_cell = { workspace = true }
+tokio = { workspace = true }