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_test.go

@@ -1,6 +1,7 @@
 package core
 
 import (
+	"fmt"
 	"os"
 	"path/filepath"
 	"strings"
@@ -749,6 +750,76 @@ func (suite *CoreTestSuite) TestMultihostIsolation() {
 	suite.Equal(hostContent, string(symlinkContent))
 }
 
+// Test bootstrap script detection
+func (suite *CoreTestSuite) TestFindBootstrapScript() {
+	err := suite.lnk.Init()
+	suite.Require().NoError(err)
+
+	// Test with no bootstrap script
+	scriptPath, err := suite.lnk.FindBootstrapScript()
+	suite.NoError(err)
+	suite.Empty(scriptPath)
+
+	// Test with bootstrap.sh
+	bootstrapScript := filepath.Join(suite.tempDir, "lnk", "bootstrap.sh")
+	err = os.WriteFile(bootstrapScript, []byte("#!/bin/bash\necho 'test'"), 0644)
+	suite.Require().NoError(err)
+
+	scriptPath, err = suite.lnk.FindBootstrapScript()
+	suite.NoError(err)
+	suite.Equal("bootstrap.sh", scriptPath)
+}
+
+// Test bootstrap script execution
+func (suite *CoreTestSuite) TestRunBootstrapScript() {
+	err := suite.lnk.Init()
+	suite.Require().NoError(err)
+
+	// Create a test script that creates a marker file
+	bootstrapScript := filepath.Join(suite.tempDir, "lnk", "test.sh")
+	markerFile := filepath.Join(suite.tempDir, "lnk", "bootstrap-executed.txt")
+	scriptContent := fmt.Sprintf("#!/bin/bash\ntouch %s\necho 'Bootstrap executed'", markerFile)
+
+	err = os.WriteFile(bootstrapScript, []byte(scriptContent), 0755)
+	suite.Require().NoError(err)
+
+	// Run the bootstrap script
+	err = suite.lnk.RunBootstrapScript("test.sh")
+	suite.NoError(err)
+
+	// Verify the marker file was created
+	suite.FileExists(markerFile)
+}
+
+// Test bootstrap script execution with error
+func (suite *CoreTestSuite) TestRunBootstrapScriptWithError() {
+	err := suite.lnk.Init()
+	suite.Require().NoError(err)
+
+	// Create a script that will fail
+	bootstrapScript := filepath.Join(suite.tempDir, "lnk", "failing.sh")
+	scriptContent := "#!/bin/bash\nexit 1"
+
+	err = os.WriteFile(bootstrapScript, []byte(scriptContent), 0755)
+	suite.Require().NoError(err)
+
+	// Run the bootstrap script - should fail
+	err = suite.lnk.RunBootstrapScript("failing.sh")
+	suite.Error(err)
+	suite.Contains(err.Error(), "Bootstrap script failed")
+}
+
+// Test running bootstrap on non-existent script
+func (suite *CoreTestSuite) TestRunBootstrapScriptNotFound() {
+	err := suite.lnk.Init()
+	suite.Require().NoError(err)
+
+	// Try to run non-existent script
+	err = suite.lnk.RunBootstrapScript("nonexistent.sh")
+	suite.Error(err)
+	suite.Contains(err.Error(), "Bootstrap script not found")
+}
+
 func TestCoreSuite(t *testing.T) {
 	suite.Run(t, new(CoreTestSuite))
 }