metal render passes (they dont do crap)

rendering_api/metal/src/core/renderpass/metal_render_pass.h

@@ -0,0 +1,7 @@
+#pragma once
+#include "core/renderpass/gryphn_render_pass_descriptor.h"
+#import <Metal/MTLRenderPass.h>
+
+typedef struct gnPlatformRenderPassDescriptor_t {
+    MTLRenderPassDescriptor* passDescriptor;
+} gnPlatformRenderPassDescriptor;

rendering_api/metal/src/core/renderpass/metal_render_pass.m

@@ -0,0 +1,13 @@
+#include "metal_render_pass.h"
+
+gnReturnCode gnCreateRenderPassDescriptorFn(struct gnRenderPassDescriptor_t* renderPass, struct gnOutputDevice_t* device, struct gnRenderPassDescriptorInfo_t info) {
+    renderPass->renderPassDescriptor = malloc(sizeof(gnPlatformRenderPassDescriptor));
+    renderPass->renderPassDescriptor->passDescriptor = [[MTLRenderPassDescriptor alloc] init];
+
+    return GN_SUCCESS;
+}
+
+void gnDestroyRenderPassDescriptorFn(struct gnRenderPassDescriptor_t* renderPass) {
+    [renderPass->renderPassDescriptor->passDescriptor release];
+    free(renderPass->renderPassDescriptor);
+}