Add InputTileInfo function for tile information input handling in GUI

src/app/gui/input.h

@@ -13,6 +13,7 @@
 #include "absl/strings/string_view.h"
 #include "app/gfx/bitmap.h"
 #include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
 #include "app/gui/canvas.h"
 #include "app/gui/color.h"
 #include "imgui/imgui.h"
@@ -45,6 +46,8 @@ IMGUI_API bool ListBox(const char* label, int* current_item,
                        const std::vector<std::string>& items,
                        int height_in_items = -1);
 
+bool InputTileInfo(const char* label, gfx::TileInfo* tile_info);
+
 using ItemLabelFlags = enum ItemLabelFlag {
   Left = 1u << 0u,
   Right = 1u << 1u,