initial project scaffold

Rust workspace with nomina-core (rename engine) and nomina-app (Tauri v2 shell).
React/TypeScript frontend with tabbed rule panels, virtual-scrolled file list,
and Zustand state management. All 9 rule types implemented with 25 passing tests.

crates/nomina-app/Cargo.toml

@@ -0,0 +1,23 @@
+[package]
+name = "nomina-app"
+version = "0.1.0"
+edition = "2021"
+license = "CC0-1.0"
+
+[dependencies]
+nomina-core = { path = "../nomina-core" }
+tauri = { version = "2", features = [] }
+tauri-plugin-dialog = "2"
+tauri-plugin-shell = "2"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+chrono = { version = "0.4", features = ["serde"] }
+uuid = { version = "1", features = ["v4", "serde"] }
+log = "0.4"
+env_logger = "0.11"
+directories = "6"
+anyhow = "1"
+tokio = { version = "1", features = ["full"] }
+
+[build-dependencies]
+tauri-build = { version = "2", features = [] }