Fix uninitialized warning and remove header pollution (#803)

* Fix uninitialized warning and remove header pollution

* Nits

* IWYU

* More IWYU

include/renderer_mtl/mtl_command_encoder.hpp

@@ -2,6 +2,8 @@
 
 #include <Metal/Metal.hpp>
 
+#include "helpers.hpp"
+
 namespace Metal {
 	struct RenderState {
 		MTL::RenderPipelineState* renderPipelineState = nullptr;

include/renderer_mtl/mtl_depth_stencil_cache.hpp

@@ -2,6 +2,7 @@
 
 #include <map>
 
+#include "helpers.hpp"
 #include "pica_to_mtl.hpp"
 
 using namespace PICA;
@@ -17,7 +18,6 @@ namespace Metal {
 	class DepthStencilCache {
 	  public:
 		DepthStencilCache() = default;
-
 		~DepthStencilCache() { reset(); }
 
 		void set(MTL::Device* dev) { device = dev; }

include/renderer_mtl/mtl_draw_pipeline_cache.hpp

@@ -2,6 +2,7 @@
 
 #include <map>
 
+#include "helpers.hpp"
 #include "objc_helper.hpp"
 #include "pica_to_mtl.hpp"
 

include/renderer_mtl/mtl_lut_texture.hpp

@@ -2,19 +2,22 @@
 
 #include <Metal/Metal.hpp>
 
+#include "helpers.hpp"
+
 namespace Metal {
 
-class LutTexture {
-public:
-    LutTexture(MTL::Device* device, MTL::TextureType type, MTL::PixelFormat pixelFormat, u32 width, u32 height, const char* name);
-    ~LutTexture();
-    u32 getNextIndex();
+	class LutTexture {
+	  public:
+		LutTexture(MTL::Device* device, MTL::TextureType type, MTL::PixelFormat pixelFormat, u32 width, u32 height, const char* name);
+		~LutTexture();
+		u32 getNextIndex();
 
-    MTL::Texture* getTexture() { return texture; }
-    u32 getCurrentIndex() { return currentIndex; }
-private:
-    MTL::Texture* texture;
-    u32 currentIndex = 0;
-};
+		MTL::Texture* getTexture() { return texture; }
+		u32 getCurrentIndex() { return currentIndex; }
 
-} // namespace Metal
+	  private:
+		MTL::Texture* texture;
+		u32 currentIndex = 0;
+	};
+
+}  // namespace Metal

include/renderer_mtl/mtl_vertex_buffer_cache.hpp

@@ -5,7 +5,6 @@
 #include "helpers.hpp"
 #include "pica_to_mtl.hpp"
 
-
 using namespace PICA;
 
 namespace Metal {

include/renderer_mtl/pica_to_mtl.hpp

@@ -3,6 +3,7 @@
 #include <Metal/Metal.hpp>
 
 #include "PICA/regs.hpp"
+#include "helpers.hpp"
 // TODO: remove dependency on OpenGL
 #include "opengl.hpp"