Add --no-input to hide the input section (#4210)

Close #2890
Close #1396
 
You can't type in queries in this mode, and the only way to trigger an
fzf search is to use `search(...)` action.

  # Click header to trigger search
  fzf --header '[src] [test]' --no-input --layout reverse \
      --header-border bottom --input-border \
      --bind 'click-header:transform-search:echo ${FZF_CLICK_HEADER_WORD:1:-1}'

src/tui/tui.go

@@ -615,6 +615,7 @@ type Renderer interface {
 	NeedScrollbarRedraw() bool
 	ShouldEmitResizeEvent() bool
 	Bell()
+	HideCursor()
 
 	GetChar() Event
 
@@ -662,6 +663,7 @@ type FullscreenRenderer struct {
 	forceBlack   bool
 	prevDownTime time.Time
 	clicks       [][2]int
+	showCursor   bool
 }
 
 func NewFullscreenRenderer(theme *ColorTheme, forceBlack bool, mouse bool) Renderer {
@@ -670,7 +672,8 @@ func NewFullscreenRenderer(theme *ColorTheme, forceBlack bool, mouse bool) Rende
 		mouse:        mouse,
 		forceBlack:   forceBlack,
 		prevDownTime: time.Unix(0, 0),
-		clicks:       [][2]int{}}
+		clicks:       [][2]int{},
+		showCursor:   true}
 	return r
 }