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.

Cargo.toml

@@ -2,7 +2,8 @@
 members = [
     "bread-shared",
     "breadd",
-    "bread-cli"
+    "bread-cli",
+    "bread-sync",
 ]
 resolver = "2"
 
@@ -13,3 +14,8 @@ tokio = { version = "1.40", features = ["full"] }
 anyhow = "1.0"
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+git2 = "0.18"
+dirs = "5.0"
+chrono = { version = "0.4", features = ["serde"] }
+tempfile = "3"
+glob = "0.3"