2024 Easter Event

What has been done in this MR?

• Added brand new easter event (a revision and refinement of a previous egg-hunting event we did)
• Cleaned up WorldEvent code a little bit.
• Added support for forced-global ground items. Only used by this code currently.

What should testers check?

• A new batch of eggs should spawn in a (somewhat) random town with random locations roughly every 30 minutes.
• Eggs should also randomly appear while gaining XP (in a dev environment the rate is 1/3, in prod 1/64, with a 10 tick cooldown between rolls)
• When clicked on, the player should run up and stomp the egg open for a random loot item.
• If telegrabbed, then when the Release option is used it should do the same thing as above.
• On the 5th egg broken, the player should unlock 1 of the 3 easter music tracks if not already unlocked.
• On the 10th egg broken, the player should unlock the bunny hop emote.
• On the 15th egg broken, the player should receive the new black bunny ears.
• Every 5 eggs broken afterwords, the player should unlock one of the other two music tracks if not already unlocked.
• If not a multiple of 5, or if the music track is already unlocked, the player should instead receive random loot.

Ryan Note for Deployment:

• Enable the world.force_easter_randoms config option if deployed to test before April.

• I have tested these changes thoroughly.

• I used the relevant Thanos/Zaros tool for any JSON edits where possible, and have attached screenshots of any changes.