chore: Setup code skeleton of datanode

src/table/Cargo.toml

@@ -6,3 +6,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+async-trait = "0.1"

src/table/src/engine.rs

@@ -0,0 +1,3 @@
+/// Table engine abstraction.
+#[async_trait::async_trait]
+pub trait Engine {}

src/table/src/lib.rs

@@ -1 +1,5 @@
+mod engine;
 
+/// Table abstraction.
+#[async_trait::async_trait]
+pub trait Table: Send + Sync {}