Item Entities and Dropping Items

[tomlister]

So far:

• Added a new entity called item.
• Modified the play handler to drop items when done so by the player.
• Added behaviour to allow entities to pick up items.

TODO:

• Implement stack merging and mob pickups
• Refactor code into methods where appropriate.
• Events

[codecov-commenter]

Codecov Report

Merging #66 (46ac3f6) into master (baf2d6d) will increase coverage by 0.36%.
The diff coverage is 3.53%.

❗ Current head 46ac3f6 differs from pull request most recent head 6e96dc4. Consider uploading reports for the commit 6e96dc4 to get more accurate results

@@             Coverage Diff              @@
##             master      #66      +/-   ##
============================================
+ Coverage     33.77%   34.13%   +0.36%     
+ Complexity      925      854      -71     
============================================
  Files           849      815      -34     
  Lines         23865    22912     -953     
  Branches       1841     1804      -37     
============================================
- Hits           8060     7822     -238     
+ Misses        15683    14994     -689     
+ Partials        122       96      -26     

Impacted Files	Coverage Δ
...in/org/kryptonmc/api/event/player/ItemDropEvent.kt	0.00% <0.00%> (ø)
...tlin/org/kryptonmc/krypton/entity/KryptonEntity.kt	0.00% <0.00%> (ø)
...kryptonmc/krypton/entity/item/KryptonItemEntity.kt	0.00% <0.00%> (ø)
...g/kryptonmc/krypton/entity/player/KryptonPlayer.kt	0.00% <0.00%> (ø)
...ptonmc/krypton/entity/player/PlayerBlockHandler.kt	0.00% <0.00%> (ø)
.../kryptonmc/krypton/network/handlers/PlayHandler.kt	0.00% <0.00%> (ø)
...lin/org/kryptonmc/krypton/packet/PacketRegistry.kt	0.00% <0.00%> (ø)
...mc/krypton/packet/out/play/PacketOutCollectItem.kt	0.00% <0.00%> (ø)
...rc/main/kotlin/org/kryptonmc/krypton/util/world.kt	0.00% <0.00%> (ø)
.../org/kryptonmc/krypton/world/block/KryptonBlock.kt	47.25% <ø> (ø)
... and 176 more

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