feat: Convert SAL to a Rust monorepo

- Migrate SAL project from single-crate to monorepo structure
- Create independent packages for individual modules
- Improve build efficiency and testing capabilities
- Update documentation to reflect new structure
- Successfully convert the git module to an independent package.

git/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "sal-git"
+version = "0.1.0"
+edition = "2021"
+authors = ["PlanetFirst <info@incubaid.com>"]
+description = "SAL Git - Git repository management and operations"
+repository = "https://git.threefold.info/herocode/sal"
+license = "Apache-2.0"
+
+[dependencies]
+regex = "1.8.1"
+redis = "0.31.0"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+rhai = { version = "1.12.0", features = ["sync"] }
+
+[dev-dependencies]
+tempfile = "3.5"