Add vendor

Specifically because I want to modify a dependency

vendor/github.com/charmbracelet/x/input/input.go

@@ -0,0 +1,47 @@
+package input
+
+import (
+	"fmt"
+	"strings"
+)
+
+var (
+	// ErrUnknownEvent is returned when an unknown event is encountered.
+	ErrUnknownEvent = fmt.Errorf("unknown event")
+
+	// ErrEmpty is returned when the event buffer is empty.
+	ErrEmpty = fmt.Errorf("empty event buffer")
+)
+
+// Event represents a terminal input event.
+type Event interface{}
+
+// UnknownEvent represents an unknown event.
+type UnknownEvent string
+
+// String implements fmt.Stringer.
+func (e UnknownEvent) String() string {
+	return fmt.Sprintf("%q", string(e))
+}
+
+// WindowSizeEvent represents a window resize event.
+type WindowSizeEvent struct {
+	Width, Height int
+}
+
+// String implements fmt.Stringer.
+func (e WindowSizeEvent) String() string {
+	return fmt.Sprintf("resize: %dx%d", e.Width, e.Height)
+}
+
+// MultiEvent represents multiple events.
+type MultiEvent []Event
+
+// String implements fmt.Stringer.
+func (e MultiEvent) String() string {
+	var sb strings.Builder
+	for _, ev := range e {
+		sb.WriteString(fmt.Sprintf("%v\n", ev))
+	}
+	return sb.String()
+}