Modernize project codebase (#906)

* Fixed boats falling and a TP glitch #266

* Replaced every C-style cast with C++ ones

* Replaced every C-style cast with C++ ones

* Fixed boats falling and a TP glitch #266

* Updated NULL to nullptr and fixing some type issues

* Modernized and fixed a few bugs

- Replaced most instances of `NULL` with `nullptr`.
- Replaced most `shared_ptr(new ...)` with `make_shared`.
- Removed the `nullptr` macro as it was interfering with the actual nullptr keyword in some instances.

* Fixing more conflicts

* Replace int loops with size_t and start work on overrides

* Add safety checks and fix a issue with vector going OOR

Minecraft.World/HatchetItem.cpp

@@ -2,7 +2,7 @@
 #include "net.minecraft.world.level.tile.h"
 #include "HatchetItem.h"
 
-TileArray *HatchetItem::diggables = NULL;
+TileArray *HatchetItem::diggables = nullptr;
 
 void HatchetItem::staticCtor()
 {
@@ -25,7 +25,7 @@ HatchetItem::HatchetItem(int id, const Tier *tier) : DiggerItem (id, 3, tier, di
 // 4J - brought forward from 1.2.3
 float HatchetItem::getDestroySpeed(shared_ptr<ItemInstance> itemInstance, Tile *tile)
 {
-    if (tile != NULL && (tile->material == Material::wood  || tile->material == Material::plant || tile->material == Material::replaceable_plant))
+    if (tile != nullptr && (tile->material == Material::wood  || tile->material == Material::plant || tile->material == Material::replaceable_plant))
 	{
         return speed;
     }