Can someone make a custom villager shop that sells custom things that the operator of a server can choose? And to buy these items you need coins that are displayed on the right-hand side of a player's screen? Can it also include commands like /pay <player> <amount>. And every 1 hour every player will get a custom amount of coins that the operator of the server chooses?
Could you please read this first: https://bukkit.org/threads/read-me-first-plugin-requests-guide.81209/ and use the request format? It will help me and others a lot if we want to actually start working on your plugin; i.e. I don't know basic things like what version this is even for.