feat: add internal ZCLAW kernel crates to git tracking

crates/zclaw-memory/Cargo.toml

@@ -0,0 +1,25 @@
+[package]
+name = "zclaw-memory"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+description = "ZCLAW memory substrate with SQLite storage"
+
+[dependencies]
+zclaw-types = { workspace = true }
+
+tokio = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+thiserror = { workspace = true }
+uuid = { workspace = true }
+chrono = { workspace = true }
+tracing = { workspace = true }
+
+# SQLite
+sqlx = { workspace = true }
+
+# Async utilities
+futures = { workspace = true }