Scaffold Cargo workspace: alkstore core + sqlite/postgres engine stubs (ADR-001)

alkstore-postgres/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "alkstore-postgres"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+
+[dependencies]
+alkstore = { version = "0.1", path = "../alkstore" }
+tokio = { version = "1", features = ["rt-multi-thread", "macros"] }
+tokio-postgres = "0.7"
+deadpool-postgres = "0.14"