[Feature] Limit quantity of purchases in given timeframe

[AdamWGrise]

Describe the Feature:

Some rare or high-demand items can be difficult for new or casual players to obtain. As someone who tries to help out those players, I try to keep prices low in my shop. The problem is that, unless I manage to catch those players online and advertise to them at just the right time, I have little to no opportunity to target them: Market-focused players are always on the prowl for my shop full of Mending books, Elytras, or Cooked Pork Chops, so they can buy out all of them and mark them up to outlandish prices, starving the market of reasonably-priced items. Further, it makes it harder for a casual shop owner to gain any sort of reputation for having good prices, since those near-spawn shop owners have a monopoly on these items.

My feature request would be to allow setting a limit on the number of items a player can purchase from a shop for a given period of time (in-game days, actual minutes, etc.).

Shop owners could have a command that would let them define a quantity and period of time; for example:
/quickshop limit 3 day
...would limit a player to three of that item per day. I don't know enough about units of time and how they're measured in Minecraft, so this may be a bad example - but hopefully this gets the idea across.

Screenshots:

None.

Additional context:

This feature shares a similarity with issue #469 regarding limiting how much money a player can make by selling items to a shop within a given period of time. The code needed to reinforce the "cooldown" period may be useful toward building this feature as well.

[Ghost-chu]

Remove impl by addon label, this feature will added into QuickShop it self.

[Ghost-chu]

@AdamWGrise
@WardenDrew
@Sapherises
This feature now impl by addon:
https://github.com/Ghost-chu/QuickShopLimited/
https://ci.codemc.io/job/Ghost-chu/job/QuickShopLimited/

• Still WIP, not stable, something not working, there also have errors not fixed yet, text is ugly, but it works
• Require development build of QuickShop !!!!BACKUP SHOP DATABASE!!!!
• Test is welcome
• Never install it on your production server