Initial node implementation (#4)

Reviewed-on: #4
Co-authored-by: Zack <zack@bfpower.io>
Co-committed-by: Zack <zack@bfpower.io>

commander/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "physical-commander"
+description = "A commander hosts nodes."
+version.workspace = true
+edition.workspace = true
+repository.workspace = true
+readme.workspace = true
+license.workspace = true
+
+[dependencies.physical]
+path = ".."
+[dependencies.tracing]
+workspace = true