Drop Spread 2

# Drop Spread 2 The successor to [Drop Spread](https://modrinth.com/mod/dropspread), ported to 1.21. Adds the `dropSpread` gamerule, allowing values between 0.1 and 10, that controls how far player items are launched on death, where 1 is the vanilla velocity, and 0.1 is the mod's default, as seen in the mod icon. All credit for idea and code goes to [jadc](https://modrinth.com/user/jadc), the original author, but given that his github repo hasn't been updated in 2 years, it seemed best to just port it myself.