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

src/lib.rs

@@ -0,0 +1,8 @@
+pub mod config;
+pub mod state;
+pub mod planner;
+pub mod executor;
+pub mod jail;
+pub mod vm;
+pub mod zfs;
+pub mod commands;