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

cmd/bootstrap.go

@@ -0,0 +1,45 @@
+package cmd
+
+import (
+	"github.com/spf13/cobra"
+	"github.com/yarlson/lnk/internal/core"
+)
+
+func newBootstrapCmd() *cobra.Command {
+	return &cobra.Command{
+		Use:           "bootstrap",
+		Short:         "🚀 Run the bootstrap script to set up your environment",
+		Long:          "Executes the bootstrap script from your dotfiles repository to install dependencies and configure your system.",
+		SilenceUsage:  true,
+		SilenceErrors: true,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			lnk := core.NewLnk()
+
+			scriptPath, err := lnk.FindBootstrapScript()
+			if err != nil {
+				return err
+			}
+
+			if scriptPath == "" {
+				printf(cmd, "💡 \033[33mNo bootstrap script found\033[0m\n")
+				printf(cmd, "   📝 Create a \033[1mbootstrap.sh\033[0m file in your dotfiles repository:\n")
+				printf(cmd, "      \033[90m#!/bin/bash\033[0m\n")
+				printf(cmd, "      \033[90mecho \"Setting up environment...\"\033[0m\n")
+				printf(cmd, "      \033[90m# Your setup commands here\033[0m\n")
+				return nil
+			}
+
+			printf(cmd, "🚀 \033[1mRunning bootstrap script\033[0m\n")
+			printf(cmd, "   📄 Script: \033[36m%s\033[0m\n", scriptPath)
+			printf(cmd, "\n")
+
+			if err := lnk.RunBootstrapScript(scriptPath); err != nil {
+				return err
+			}
+
+			printf(cmd, "\n✅ \033[1;32mBootstrap completed successfully!\033[0m\n")
+			printf(cmd, "   🎉 Your environment is ready to use\n")
+			return nil
+		},
+	}
+}