Completely redesign and rework the resin harvesting process

[elifoster]

Now instead of simply being a rare drop from spruce logs, you carve into spruce trees with your sword which causes the tree to produce a harvestable glob of resin after some time. The more you damage a tree to exploit it the longer it will take to produce. Like syrup, it must be a living spruce tree. After a few days without being harvested, the hardened resin will fall and the tree will begin to produce it again, making resin production automatable albeit very slowly.

One possible future change would be to add our own foraging knife, rather than using a sword, which could be used for this and to setup and harvest mushrooms which is something I am considering (to resolve basically the same issue but for the false morel, as well as to have an alternative method of farming mushrooms)

For #38.

TODO:

• [x] Jade/WTHIT icon.
• [x] Playtesting.
• [x] Perhaps change localized name to something unique
• [ ] Foragers knife?

[elifoster]

First thoughts in playtesting is it hardens too slow. It's probably more realistic that way but it's kind of annoying.