feat(docker): add dev.sh with auto-funding and ATM app setup

- Add dev.sh script for managing regtest development environment
- Implement cmd_fund to fund ATM app owner via Lightning.Pub API
- Add --fund flag to cmd_up for automatic funding on startup
- Update setup_atm_app to write VITE_APP_ID to machine .env
- Fix Electron IPC to pass appId and extensionApiUrl to renderer
- Restructure repo from nested lamassu-next/ to root

The dev.sh script now supports:
- ./dev.sh up --fund  # Start regtest and auto-fund ATM
- ./dev.sh fund       # Fund existing ATM app
- ./dev.sh status     # Show environment status
- ./dev.sh reset      # Clean restart

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/hal/Cargo.toml

@@ -0,0 +1,50 @@
+[package]
+name = "lamassu-hal"
+version = "0.1.0"
+edition = "2021"
+description = "Hardware Abstraction Layer for Lamassu ATM"
+license = "MIT"
+repository = "https://github.com/lamassu/lamassu-next"
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+# napi-rs for Node.js bindings
+napi = { version = "2", features = ["async", "tokio_rt"] }
+napi-derive = "2"
+
+# Async runtime
+tokio = { version = "1", features = ["full"] }
+
+# Serial port communication
+tokio-serial = "5"
+
+# Error handling
+thiserror = "1"
+
+# Async traits
+async-trait = "0.1"
+
+# Logging
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+
+# Serialization
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+
+[build-dependencies]
+napi-build = "2"
+
+[profile.release]
+lto = true
+strip = true
+codegen-units = 1
+
+[features]
+default = []
+# Enable hardware drivers (for production builds)
+hardware = []
+# Mock-only build (for testing/development)
+mock-only = []