feat: add bread-sync module for snapshot and restore functionality

- Introduced `bread-sync` module with core functionalities for syncing system state via Git.
- Implemented `MachineProfile` struct for managing machine profiles, including methods for reading and writing profiles.
- Added package management support with snapshot capabilities for `pacman`, `pip`, `npm`, and `cargo`.
- Created comprehensive tests for sync operations, package parsing, and machine profile management.
- Enhanced `udev` adapter to include vendor and product IDs for scanned devices.
- Updated state engine to handle module clearing commands.
- Introduced Lua integration for accessing machine information and file system operations.
- Improved packaging documentation for Arch Linux and systemd service setup.

bread-sync/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "bread-sync"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+serde.workspace = true
+serde_json.workspace = true
+anyhow.workspace = true
+git2.workspace = true
+dirs.workspace = true
+chrono.workspace = true
+glob.workspace = true
+toml = "0.8"
+libc = "0.2"
+
+[dev-dependencies]
+tempfile.workspace = true