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/tests/git_tests.rs

@@ -0,0 +1,119 @@
+use sal_git::*;
+use std::fs;
+use tempfile::TempDir;
+
+#[test]
+fn test_parse_git_url_https() {
+    let (server, account, repo) = parse_git_url("https://github.com/user/repo.git");
+    assert_eq!(server, "github.com");
+    assert_eq!(account, "user");
+    assert_eq!(repo, "repo");
+}
+
+#[test]
+fn test_parse_git_url_https_without_git_extension() {
+    let (server, account, repo) = parse_git_url("https://github.com/user/repo");
+    assert_eq!(server, "github.com");
+    assert_eq!(account, "user");
+    assert_eq!(repo, "repo");
+}
+
+#[test]
+fn test_parse_git_url_ssh() {
+    let (server, account, repo) = parse_git_url("git@github.com:user/repo.git");
+    assert_eq!(server, "github.com");
+    assert_eq!(account, "user");
+    assert_eq!(repo, "repo");
+}
+
+#[test]
+fn test_parse_git_url_ssh_without_git_extension() {
+    let (server, account, repo) = parse_git_url("git@github.com:user/repo");
+    assert_eq!(server, "github.com");
+    assert_eq!(account, "user");
+    assert_eq!(repo, "repo");
+}
+
+#[test]
+fn test_parse_git_url_invalid() {
+    let (server, account, repo) = parse_git_url("invalid-url");
+    assert_eq!(server, "");
+    assert_eq!(account, "");
+    assert_eq!(repo, "");
+}
+
+#[test]
+fn test_git_tree_new_creates_directory() {
+    let temp_dir = TempDir::new().unwrap();
+    let base_path = temp_dir.path().join("git_repos");
+    let base_path_str = base_path.to_str().unwrap();
+
+    let _git_tree = GitTree::new(base_path_str).unwrap();
+    assert!(base_path.exists());
+    assert!(base_path.is_dir());
+}
+
+#[test]
+fn test_git_tree_new_existing_directory() {
+    let temp_dir = TempDir::new().unwrap();
+    let base_path = temp_dir.path().join("existing_dir");
+    fs::create_dir_all(&base_path).unwrap();
+    let base_path_str = base_path.to_str().unwrap();
+
+    let _git_tree = GitTree::new(base_path_str).unwrap();
+}
+
+#[test]
+fn test_git_tree_new_invalid_path() {
+    let temp_dir = TempDir::new().unwrap();
+    let file_path = temp_dir.path().join("file.txt");
+    fs::write(&file_path, "content").unwrap();
+    let file_path_str = file_path.to_str().unwrap();
+
+    let result = GitTree::new(file_path_str);
+    assert!(result.is_err());
+    if let Err(error) = result {
+        match error {
+            GitError::InvalidBasePath(_) => {}
+            _ => panic!("Expected InvalidBasePath error"),
+        }
+    }
+}
+
+#[test]
+fn test_git_tree_list_empty_directory() {
+    let temp_dir = TempDir::new().unwrap();
+    let base_path_str = temp_dir.path().to_str().unwrap();
+
+    let git_tree = GitTree::new(base_path_str).unwrap();
+    let repos = git_tree.list().unwrap();
+    assert!(repos.is_empty());
+}
+
+#[test]
+fn test_git_repo_new() {
+    let repo = GitRepo::new("/path/to/repo".to_string());
+    assert_eq!(repo.path(), "/path/to/repo");
+}
+
+#[test]
+fn test_git_repo_clone() {
+    let repo1 = GitRepo::new("/path/to/repo".to_string());
+    let repo2 = repo1.clone();
+    assert_eq!(repo1.path(), repo2.path());
+}
+
+#[test]
+fn test_git_error_display() {
+    let error = GitError::InvalidUrl("bad-url".to_string());
+    assert_eq!(format!("{}", error), "Could not parse git URL: bad-url");
+
+    let error = GitError::NoRepositoriesFound;
+    assert_eq!(format!("{}", error), "No repositories found");
+
+    let error = GitError::RepositoryNotFound("pattern".to_string());
+    assert_eq!(
+        format!("{}", error),
+        "No repositories found matching 'pattern'"
+    );
+}