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.Client/Windows64/Iggy/include/iggyexpruntime.h

@@ -25,8 +25,8 @@ IDOC RADEXPFUNC HIGGYEXP RADEXPLINK IggyExpCreate(char *ip_address, S32 port, vo
    $:storage A small block of storage that needed to store the $HIGGYEXP, must be at least $IGGYEXP_MIN_STORAGE
    $:storage_size_in_bytes The size of the block pointer to by <tt>storage</tt>
 
-Returns a NULL HIGGYEXP if the IP address/hostname can't be resolved, or no Iggy Explorer
-can be contacted at the specified address/port. Otherwise returns a non-NULL $HIGGYEXP
+Returns a nullptr HIGGYEXP if the IP address/hostname can't be resolved, or no Iggy Explorer
+can be contacted at the specified address/port. Otherwise returns a non-nullptr $HIGGYEXP
 which you can pass to $IggyUseExplorer. */
 
 IDOC RADEXPFUNC void  RADEXPLINK IggyExpDestroy(HIGGYEXP p);