init: Engram v0.1 — native memory substrate for accumulating intelligence

Memory is not stored and retrieved — it is activated and propagated.
Implements the spreading activation model with salience decay, typed edges,
four memory tiers, and flat cosine vector search over a sled embedded store.

engram/Cargo.toml

@@ -0,0 +1,20 @@
+[workspace]
+resolver = "2"
+members = [
+    "crates/engram-core",
+    "crates/engram-ffi",
+]
+
+# Workspace-level example that depends on engram-core.
+# Run with: cargo run --example basic
+[[example]]
+name = "basic"
+path = "examples/basic.rs"
+
+[package]
+name = "engram"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+engram-core = { path = "crates/engram-core" }