feat: 29 funciones TUI — constructores, runners y helpers del dominio tui

16 constructores puros (NewList, NewSpinner, NewProgress, DefaultStyles...),
4 runners impuros (RunModel, RunFullscreen, RunWithMouseSupport, Confirm),
5 print helpers impuros (PrintSuccess/Error/Warning/Info/Muted) y
4 utilidades puras (Quit, ClearScreen, HideCursor, ShowCursor).
Stubs que documentan devfactory/tui para el registry.

functions/tui/quit_msg.md

@@ -0,0 +1,32 @@
+---
+name: quit_msg
+kind: function
+lang: go
+domain: tui
+version: "1.0.0"
+purity: pure
+signature: "func Quit() tea.Msg"
+description: "Devuelve un mensaje de salida para el bucle de Bubble Tea."
+tags: [tui, quit, message, bubbletea]
+uses_functions: []
+uses_types: []
+returns: []
+returns_optional: false
+error_type: ""
+imports: [github.com/charmbracelet/bubbletea]
+tested: false
+tests: []
+test_file_path: ""
+file_path: "functions/tui/quit_msg.go"
+---
+
+## Ejemplo
+
+```go
+msg := Quit()
+// msg es tea.QuitMsg{}, usado para terminar el event loop de Bubble Tea
+```
+
+## Notas
+
+Wrapper puro sobre tea.QuitMsg{}. Util para componer en pipelines o pasar como callback sin exponer el tipo directamente.