Initial project setup: README, Cargo.toml, and CLI scaffolding

- Add README with project overview, architecture, and roadmap
- Set up Rust project with clap, toml, serde, tracing dependencies
- Scaffold CLI with 6 commands (init, validate, diff, check, apply, rollback)
- Create module structure for config, state, planner, executor, jail, vm, zfs
- Create test directory structure for unit/integration/idempotency tests

Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "rostyr"
+version = "0.1.0"
+edition = "2024"
+description = "FreeBSD configuration management tool"
+authors = ["Jakob"]
+license = "Unlicense"
+repository = "https://gitea.rowanbrook.net/jakob/rostyr"
+
+[dependencies]
+clap = { version = "4.5", features = ["derive"] }
+toml = "0.8"
+serde = { version = "1.0", features = ["derive"] }
+thiserror = "1.0"
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+anyhow = "1.0"
+
+[dev-dependencies]
+tempfile = "3.10"
+assert_cmd = "2.0"
+predicates = "3.1"