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-cli/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "neuron-cli"
+version = "0.1.0"
+edition = "2021"
+
+[[bin]]
+name = "neuron"
+path = "src/main.rs"
+
+[dependencies]
+reqwest = { version = "0.12", features = ["json", "blocking"] }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+tokio = { version = "1", features = ["full"] }
+clap = { version = "4", features = ["derive"] }
+rustyline = "14"
+uuid = { version = "1", features = ["v4"] }
+colored = "2"
+chrono = { version = "0.4", features = ["serde"] }