Add HUD for gameplay

[Spacarar]

the hud should consist of:

• a pause button in the upper left corner
• the node information in the upper right corner
  • the size_t identifier and node height
• the current update rate of the grid on display on the lower left corner
• buttons to control modes on the lower right corner
  • select button: select a rectangle region (to be used for saving patterns in future)
  • deselect button: ^transform to deselect all
  • paint button: left mouse draw piece, right mouse erase piece
  • search button: ^transform left mouse next grid, right mouse previous grid