SPBR-1-7

-Fix the issue of dirt_path(grass_path) will lose their textures under Optifine.
-Remake the normal textures of grass_block.
-Remake the normal textures of grass_block_snow.
-Remake the normal textures of dirt_path.
-Remake all normal textures of leaves.
-Fix a liitle bug of entity piglin and creeper.
-修复了dirt_path（grass_path）在Optifine下会丢失纹理的问题。
-重塑grass_block的法线纹理。
-重塑grass_block_snow的法线纹理。
-重塑dirt_path的法线纹理。
-重塑所有叶子法线纹理。
-修复了实体猪灵和苦力怕贴图的小错误。