fix cross-repo path deps; remove el compiler from neuron-lang/

- neuron-runtime, neuron-store, neuron-migrate: fix path deps
  (products/engram/ → foundation/engram/engrams/, products/el/ → foundation/el/engrams/)
- neuron-rs workspace: fix axon-events/axon-protocol paths
  (../../../platform/ → ../../platform/, paths were off by one level)
- neuron-lang/compiler/ removed (el self-hosting compiler now lives in foundation/el/el-compiler/)

crates/neuron-migrate/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "neuron-migrate"
+version = "0.1.0"
+edition = "2021"
+
+[[bin]]
+name = "neuron-migrate"
+path = "src/main.rs"
+
+[dependencies]
+neuron-domain = { path = "../neuron-domain" }
+neuron-store = { path = "../neuron-store" }
+engram-core = { path = "../../../../foundation/engram/engrams/engram-core" }
+rusqlite = { version = "0.31", features = ["bundled"] }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+uuid = { version = "1", features = ["v4", "serde"] }
+chrono = { version = "0.4", features = ["serde"] }
+anyhow = "1"
+tracing = "0.1"
+tracing-subscriber = "0.3"