feat: append spinner in the end when --info=inline (#4567)

Test:
  go run main.go --query "$(seq 100)" --info inline --border < <(sleep 60)
  go run main.go --query "$(seq 100)" --info inline --info-command 'echo hello' --border < <(sleep 60)

Close #4344
Close #619

Co-authored-by: Junegunn Choi <junegunn.c@gmail.com>

src/terminal.go

@@ -2981,6 +2981,11 @@ func (t *Terminal) printInfoImpl() {
 	} else {
 		outputPrinter(t.window, maxWidth)
 	}
+	if t.infoStyle == infoInline && outputLen < maxWidth-1 && t.reading {
+		t.window.Print(" ")
+		printSpinner()
+		outputLen += 2
+	}
 
 	if t.infoStyle == infoInlineRight {
 		if t.separatorLen > 0 {