Paint's Flexible Recipes

 Changes since v8:

* Added 1.20 items to flexible recipes.

    * Took into consideration that bamboo blocks are equal to 2 planks, so that lead to a huge expansion of recipes that use wood.

    * See here for all the recipes I added (A lot are vanilla because I have to get rid of vanilla recipes and re-add them for technical reasons).

* Doors and trapdoors are grouped according to type of door or trapdoor instead of putting an overwhelming amount of recipes into a single door or trapdoor recipe group.

* All stair recipes give one stair per block.

* pack_format is now 15; this datapack expects to be ran in 1.20.