feat: support installing Homebrew taps from remote config

- Add Taps field to RemoteConfig struct
- Add InstallTaps function to brew package
- Install taps before packages in custom install flow

This enables third-party taps like steipete/tap to be restored from snapshots.

Author: fullstackjam

internal/brew/brew.go

@@ -100,6 +100,32 @@ func Install(packages []string, dryRun bool) error {
 	return cmd.Run()
 }
 
+func InstallTaps(taps []string, dryRun bool) error {
+	if len(taps) == 0 {
+		return nil
+	}
+
+	if dryRun {
+		ui.Info("Would add taps:")
+		for _, t := range taps {
+			fmt.Printf("    brew tap %s\n", t)
+		}
+		return nil
+	}
+
+	ui.Info(fmt.Sprintf("Adding %d Homebrew taps...", len(taps)))
+
+	for _, tap := range taps {
+		cmd := exec.Command("brew", "tap", tap)
+		cmd.Stdout = os.Stdout
+		cmd.Stderr = os.Stderr
+		if err := cmd.Run(); err != nil {
+			ui.Warn(fmt.Sprintf("Failed to tap %s: %v", tap, err))
+		}
+	}
+	return nil
+}
+
 func InstallCask(packages []string, dryRun bool) error {
 	if len(packages) == 0 {
 		return nil
@@ -300,7 +326,7 @@ func installSmartCaskWithError(pkg string) string {
 
 func parseBrewError(output string) string {
 	lowerOutput := strings.ToLower(output)
-	
+
 	switch {
 	case strings.Contains(lowerOutput, "no available formula"):
 		return "package not found"

internal/config/config.go

@@ -37,6 +37,7 @@ type RemoteConfig struct {
 	Name         string   `json:"name"`
 	Preset       string   `json:"preset"`
 	Packages     []string `json:"packages"`
+	Taps         []string `json:"taps"`
 	DotfilesRepo string   `json:"dotfiles_repo"`
 }
 

internal/installer/installer.go

@@ -44,9 +44,21 @@ func runInstall(cfg *config.Config) error {
 
 func runCustomInstall(cfg *config.Config) error {
 	ui.Info(fmt.Sprintf("Custom config: @%s/%s", cfg.RemoteConfig.Username, cfg.RemoteConfig.Slug))
-	ui.Info(fmt.Sprintf("Installing %d packages...", len(cfg.RemoteConfig.Packages)))
+
+	if len(cfg.RemoteConfig.Taps) > 0 {
+		ui.Info(fmt.Sprintf("Adding %d taps, installing %d packages...", len(cfg.RemoteConfig.Taps), len(cfg.RemoteConfig.Packages)))
+	} else {
+		ui.Info(fmt.Sprintf("Installing %d packages...", len(cfg.RemoteConfig.Packages)))
+	}
 	fmt.Println()
 
+	if len(cfg.RemoteConfig.Taps) > 0 {
+		if err := brew.InstallTaps(cfg.RemoteConfig.Taps, cfg.DryRun); err != nil {
+			ui.Warn(fmt.Sprintf("Some taps failed: %v", err))
+		}
+		fmt.Println()
+	}
+
 	cfg.SelectedPkgs = make(map[string]bool)
 	for _, pkg := range cfg.RemoteConfig.Packages {
 		cfg.SelectedPkgs[pkg] = true