Biome colour and grass side tint options (#98)

* Added biome colour and grass side tint options

* Moved GrassColor and FoliageColor to client/renderer/

* * Fix some build issues.

* * Add the new files to the CMakeLists.txt

---------

Co-authored-by: iProgramInCpp <iprogramincpp@gmail.com>

source/client/renderer/GrassColor.cpp

@@ -0,0 +1,22 @@
+#include "GrassColor.hpp"
+
+// TODO: This should be inside of an initialized "Minecraft" instance rather than the global namespace
+bool g_bIsGrassColorAvailable = false;
+
+Texture GrassColor::texture;
+
+bool GrassColor::isAvailable()
+{
+	return g_bIsGrassColorAvailable;
+}
+
+void GrassColor::init(Texture texture)
+{
+	GrassColor::texture = texture;
+}
+
+uint32_t GrassColor::get(double x, double y)
+{
+	y *= x;
+	return GrassColor::texture.m_pixels[(int)((1.0 - y) * 255.0) << 8 | (int)((1.0 - x) * 255.0)];
+}