Add Text rendering

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

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

@@ -0,0 +1,15 @@
+
+#pragma once
+
+namespace msdf_atlas {
+
+/// Represents the repositioning of a subsection of the atlas
+struct Remap {
+    int index;
+    struct {
+        int x, y;
+    } source, target;
+    int width, height;
+};
+
+}