Skeleton primitives and interface crate (#13)

* wip interface primitives

* wip

* Integrate it inside rpc- crates

* fmt

* move tx to mod.rs

* Add interfaces, executor to toml

* Added nits, comments fix

crates/executor/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "reth-executor"
+version = "0.1.0"
+edition = "2021"
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/foundry-rs/reth"
+readme = "README.md"
+
+[dependencies]

crates/executor/src/lib.rs

@@ -0,0 +1,8 @@
+#![warn(missing_debug_implementations, missing_docs, unreachable_pub)]
+#![deny(unused_must_use, rust_2018_idioms)]
+#![doc(test(
+    no_crate_inject,
+    attr(deny(warnings, rust_2018_idioms), allow(dead_code, unused_variables))
+))]
+
+//! Reth executor executes transaction in block of data.