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/Common/DLC/DLCUIDataFile.h

@@ -10,11 +10,11 @@ private:
 
 public:
 	DLCUIDataFile(const wstring &path);
-	~DLCUIDataFile();
+	~DLCUIDataFile() override;
 
 	using DLCFile::addData;
 	using DLCFile::addParameter;
 
 	virtual void addData(PBYTE pbData, DWORD dwBytes,bool canDeleteData = false);
-	virtual PBYTE getData(DWORD &dwBytes);
+    PBYTE getData(DWORD &dwBytes) override;
 };