feat: change recipe to hemp and upgraded bags

Hemp bags + Bigger bags = WIN

• Changed bag recipe to use hemp
• Increased large bag capacity
• Added label for bag number

This PR must be accepted before the minetest-game repo PR

mentioned in merge request minetest_game!1 (merged)

mentioned in commit 66f4c912

Status changed to merged

Thanks for your contribution I would like to have both available: hemp and leather :)

mentioned in commit minetest_game@b3edafbb