Add Text rendering

- Add FreeType as dependency
- Add MsdfGen as dependency
- Add MsdfAtlasGen as dependency

CopiumEngine/ext/include/msdf-atlas-gen/utf8.h

@@ -0,0 +1,12 @@
+
+#pragma once
+
+#include <vector>
+#include "types.h"
+
+namespace msdf_atlas {
+
+/// Decodes the UTF-8 string into an array of Unicode codepoints
+void utf8Decode(std::vector<unicode_t> &codepoints, const char *utf8String);
+
+}