feat(bootstrap): add automatic environment setup with bootstrap scripts

Implement bootstrap functionality for streamlined dotfiles setup:
- Add 'bootstrap' command to run setup scripts manually
- Auto-execute bootstrap on 'init' with remote (--no-bootstrap to skip)
- Update README with bootstrap usage and examples
- Extend tests to cover bootstrap scenarios

internal/core/lnk.go

@@ -3,6 +3,7 @@ package core
 import (
 	"fmt"
 	"os"
+	"os/exec"
 	"path/filepath"
 	"sort"
 	"strings"
@@ -630,3 +631,52 @@ func (l *Lnk) writeManagedItems(items []string) error {
 
 	return nil
 }
+
+// FindBootstrapScript searches for a bootstrap script in the repository
+func (l *Lnk) FindBootstrapScript() (string, error) {
+	// Check if repository is initialized
+	if !l.git.IsGitRepository() {
+		return "", fmt.Errorf("❌ Lnk repository not initialized\n   💡 Run \033[1mlnk init\033[0m first")
+	}
+
+	// Look for bootstrap.sh - simple, opinionated choice
+	scriptPath := filepath.Join(l.repoPath, "bootstrap.sh")
+	if _, err := os.Stat(scriptPath); err == nil {
+		return "bootstrap.sh", nil
+	}
+
+	return "", nil // No bootstrap script found
+}
+
+// RunBootstrapScript executes the bootstrap script
+func (l *Lnk) RunBootstrapScript(scriptName string) error {
+	scriptPath := filepath.Join(l.repoPath, scriptName)
+
+	// Verify the script exists
+	if _, err := os.Stat(scriptPath); os.IsNotExist(err) {
+		return fmt.Errorf("❌ Bootstrap script not found: \033[31m%s\033[0m", scriptName)
+	}
+
+	// Make sure it's executable
+	if err := os.Chmod(scriptPath, 0755); err != nil {
+		return fmt.Errorf("❌ Failed to make bootstrap script executable: %w", err)
+	}
+
+	// Run with bash (since we only support bootstrap.sh)
+	cmd := exec.Command("bash", scriptPath)
+
+	// Set working directory to the repository
+	cmd.Dir = l.repoPath
+
+	// Connect to stdout/stderr for user to see output
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	cmd.Stdin = os.Stdin
+
+	// Run the script
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("❌ Bootstrap script failed with error: %w", err)
+	}
+
+	return nil
+}