feat: simplify README and improve init command

internal/core/lnk.go

@@ -45,6 +45,16 @@ func getRepoPath() string {
 
 // Init initializes the lnk repository
 func (l *Lnk) Init() error {
+	return l.InitWithRemote("")
+}
+
+// InitWithRemote initializes the lnk repository, optionally cloning from a remote
+func (l *Lnk) InitWithRemote(remoteURL string) error {
+	if remoteURL != "" {
+		// Clone from remote
+		return l.Clone(remoteURL)
+	}
+
 	// Create the repository directory
 	if err := os.MkdirAll(l.repoPath, 0755); err != nil {
 		return fmt.Errorf("failed to create lnk directory: %w", err)
@@ -70,6 +80,14 @@ func (l *Lnk) Init() error {
 	return nil
 }
 
+// Clone clones a repository from the given URL
+func (l *Lnk) Clone(url string) error {
+	if err := l.git.Clone(url); err != nil {
+		return fmt.Errorf("failed to clone repository: %w", err)
+	}
+	return nil
+}
+
 // AddRemote adds a remote to the repository
 func (l *Lnk) AddRemote(name, url string) error {
 	if err := l.git.AddRemote(name, url); err != nil {

internal/git/git.go

@@ -457,3 +457,43 @@ func (g *Git) Pull() error {
 
 	return nil
 }
+
+// Clone clones a repository from the given URL
+func (g *Git) Clone(url string) error {
+	// Remove the directory if it exists to ensure clean clone
+	if err := os.RemoveAll(g.repoPath); err != nil {
+		return fmt.Errorf("failed to remove existing directory: %w", err)
+	}
+
+	// Create parent directory
+	parentDir := filepath.Dir(g.repoPath)
+	if err := os.MkdirAll(parentDir, 0755); err != nil {
+		return fmt.Errorf("failed to create parent directory: %w", err)
+	}
+
+	// Clone the repository
+	cmd := exec.Command("git", "clone", url, g.repoPath)
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("git clone failed: %w\nOutput: %s", err, string(output))
+	}
+
+	// Set up upstream tracking for main branch
+	cmd = exec.Command("git", "branch", "--set-upstream-to=origin/main", "main")
+	cmd.Dir = g.repoPath
+	_, err = cmd.CombinedOutput()
+	if err != nil {
+		// If main doesn't exist, try master
+		cmd = exec.Command("git", "branch", "--set-upstream-to=origin/master", "master")
+		cmd.Dir = g.repoPath
+		_, err = cmd.CombinedOutput()
+		if err != nil {
+			// If that also fails, try to set upstream for current branch
+			cmd = exec.Command("git", "branch", "--set-upstream-to=origin/HEAD")
+			cmd.Dir = g.repoPath
+			_, _ = cmd.CombinedOutput() // Ignore error as this is best effort
+		}
+	}
+
+	return nil
+}