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/new_spinner_with_timeout.md

@@ -0,0 +1,31 @@
+---
+name: new_spinner_with_timeout
+kind: function
+lang: go
+domain: tui
+version: "1.0.0"
+purity: pure
+signature: "func NewSpinnerWithTimeout(message string, timeout time.Duration) SpinnerWithTimeoutModel"
+description: "Construye un modelo de spinner con limite de tiempo. Si la operacion excede el timeout, el spinner se detiene automaticamente."
+tags: [tui, spinner, timeout, constructor]
+uses_functions: []
+uses_types: []
+returns: [spinner_with_timeout_model_go_tui]
+returns_optional: false
+error_type: ""
+imports: [time]
+tested: false
+tests: []
+test_file_path: ""
+file_path: "functions/tui/new_spinner_with_timeout.go"
+---
+
+## Ejemplo
+
+```go
+model := NewSpinnerWithTimeout("Esperando respuesta...", 30*time.Second)
+```
+
+## Notas
+
+El timeout es configuracion pura — el side effect de cancelar ocurre en el runtime de Bubble Tea, no en el constructor.