Add vendor

Specifically because I want to modify a dependency

vendor/github.com/charmbracelet/bubbletea/signals_unix.go

@@ -0,0 +1,33 @@
+//go:build darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || aix || zos
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris aix zos
+
+package tea
+
+import (
+	"os"
+	"os/signal"
+	"syscall"
+)
+
+// listenForResize sends messages (or errors) when the terminal resizes.
+// Argument output should be the file descriptor for the terminal; usually
+// os.Stdout.
+func (p *Program) listenForResize(done chan struct{}) {
+	sig := make(chan os.Signal, 1)
+	signal.Notify(sig, syscall.SIGWINCH)
+
+	defer func() {
+		signal.Stop(sig)
+		close(done)
+	}()
+
+	for {
+		select {
+		case <-p.ctx.Done():
+			return
+		case <-sig:
+		}
+
+		p.checkResize()
+	}
+}