Alpha v0.0.4 (1.21.4)

This update has a few additions, but mostly consists of changes and fixes.

Additions

Lawn Gadget: The ultimate helper tool for building lawns. Use on a lawn block to modify it in some way. Punch a block with the tool to switch modes. Punch a block while sneaking to toggle between modifying markers and modifying lawn blocks.
Target: Spawns a Target Zombie.

Wall-nut: Acts as a wall to hold zombies off. Don't worry, it doesn't cause him any pain.

Target Zombie: A zombie that does nothing and holds a target. In Versus matches, the plants need to take out a certain amount of these to win. (In the actual game, it's 3 out of 5 targets destroyed to win. Determine your threshold based off the amount of paths.) Plants placed off the path will not target them.

A lot of items now have descriptions to hopefully be easier to understand.
- Most lawn blocks have also been renamed for the same reason.
- Text will now appear if a plant was placed in an invalid spot.
Zombies have been made slightly slower for balancing reasons.
Zombies will no longer stop "dead" in their tracks if they've been walking for too long. This probably also applies to lawnmowers, but they're faster and probably required a longer path to reach their time limit.
Certain items, namely currency, bags of currency, and seed packets now show a more concise name when selected in the hotbar.
Certain classes have been merged together and extended so that there's less duplicate code.
An attacking plant will now only target zombies that are on the same path as it and are also between it and the graveyard (path-wise), but they get highly increased follow range which will probably encompass the whole lawn if the lawn is an appropriate size.
Plants can no longer be placed within three path units of a graveyard block. Zombies can only be placed in that range. Both rules are discarded if the player wears Dave's pan.
Zombies will now only eat plants that are in their way.
It's now easier to place zombies in the same spot as a gravestone because you can use their seed packets on the gravestone instead of the block they sit on.
Plants can no longer be placed in the same spot. This rule is ignored with the use of Dave's pan.
Lawnmower hitboxes are slightly bigger.