Add Pica Texture Encoding Decoding

Supported Formats: A4, A8, L4, L8, RGB565, RGB888 RGBA8888 (for now)
Add a .clang-format
Move ctrff into a subdirectory
Replace the BCLIM creation part with Pica encoder
Fix non const RGB565ToRGBA issue

include/ctrff/pica.hpp

@@ -0,0 +1,34 @@
+#pragma once
+
+#include <ctrff/types.hpp>
+
+/**
+ * 3ds GPU Stuff
+ */
+
+namespace ctrff {
+namespace Pica {
+enum Color : u32 {
+  L8,  // tested
+  A8,  // tested
+  LA4,
+  LA8,
+  HILO8,
+  RGB565,  // tested
+  RGB888,  // tested
+  RGBA5551,
+  RGBA4444,
+  RGBA8888,  // tested
+  ETC1,
+  ETC1A4,
+  L4,  // tested
+  A4,  // tested
+};
+CTRFF_API void EncodeImage(std::vector<ctrff::u8>& ret,
+                           std::vector<ctrff::u8> rgba, int w, int h,
+                           Color dst);
+CTRFF_API void DecodeImage(std::vector<ctrff::u8>& ret,
+                           std::vector<ctrff::u8> pixels, int w, int h,
+                           Color src);
+}  // namespace Pica
+}  // namespace ctrff