Umbrella Enhancement

Updated version for 0.11.0 - The update now uses the game's Lua scripting support, so it works again like before, with some changes and additions:

- The Zoi menu has now an "Umbrella" group with "Open Umbrella" and an automatic-opening setting.
- Automatic opening can be switched ON or OFF for the whole save (enabled by default).
- Zois keep their umbrella while approaching an object. If the action needs
  the hand free, it goes into inventory at arrival without an extra animation.
- Game's automatic rain use now requires an umbrella in a playable Zoi's inventory.
  It no longer supplies umbrellas "out of thin air".
- During a walk, automatic opening skips the pickup animation so the journey
  can continue without interruption.
- While you control walking or running directly, automatic opening waits until
  the Zoi stops moving.
- Manually using "Put in Bag" delays automatic reopening for about 30 seconds.
- Game's automatic folding indoors (when coming from outdoors) will also store the umbrella in the inventory.
- Umbrellas have no resale value when removed from the inventory, including
  umbrellas originally bought in a shop.