refactor(workspace): enforce layered crate boundaries

crates/aether-ai/formats/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "aether-ai-formats"
+version = "0.1.0"
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+description = "Pure AI API format, surface, planning, and finalize logic for Aether"
+
+[dependencies]
+aether-contracts.workspace = true
+base64.workspace = true
+http.workspace = true
+regex.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+sha1 = "0.10"
+sha2.workspace = true
+url.workspace = true
+uuid.workspace = true