fix: use generic type in tty_windows.go and signals_windows.go

Author: aymanbagabas

signals_windows.go

@@ -5,6 +5,6 @@ package tea
 
 // listenForResize is not available on windows because windows does not
 // implement syscall.SIGWINCH.
-func (p *Program) listenForResize(done chan struct{}) {
+func (p *Program[T]) listenForResize(done chan struct{}) {
 	close(done)
 }

tty_windows.go

@@ -11,11 +11,11 @@ import (
 	"golang.org/x/sys/windows"
 )
 
-func (p *Program) initInput() (err error) {
+func (p *Program[T]) initInput() (err error) {
 	// Save stdin state and enable VT input
 	// We also need to enable VT
 	// input here.
-	if f, ok := p.input.(term.File); ok && term.IsTerminal(f.Fd()) {
+	if f, ok := p.Input.(term.File); ok && term.IsTerminal(f.Fd()) {
 		p.ttyInput = f
 		p.previousTtyInputState, err = term.MakeRaw(p.ttyInput.Fd())
 		if err != nil {
@@ -34,7 +34,7 @@ func (p *Program) initInput() (err error) {
 	}
 
 	// Save output screen buffer state and enable VT processing.
-	if f, ok := p.output.Writer().(term.File); ok && term.IsTerminal(f.Fd()) {
+	if f, ok := p.Output.(term.File); ok && term.IsTerminal(f.Fd()) {
 		p.ttyOutput = f
 		p.previousOutputState, err = term.GetState(f.Fd())
 		if err != nil {