chore(tui): add Charm dependencies and package skeleton

internal/tui/doc.go

@@ -0,0 +1,11 @@
+// Package tui hosts the interactive installer UI — the Huh-driven wizard
+// that collects user choices and the Bubble Tea dashboard that renders
+// live module status during engine.Run.
+package tui
+
+import (
+	_ "github.com/charmbracelet/bubbletea"
+	_ "github.com/charmbracelet/huh"
+	_ "github.com/charmbracelet/lipgloss"
+	_ "github.com/charmbracelet/x/exp/teatest"
+)