[FS] Add directory stuff, clean up

include/kernel/kernel.hpp

@@ -129,6 +129,11 @@ private:
 	void openLinkFile(u32 messagePointer, Handle file);
 	void setFilePriority(u32 messagePointer, Handle file);
 
+	// Directory operations
+	void handleDirectoryOperation(u32 messagePointer, Handle directory);
+	void closeDirectory(u32 messagePointer, Handle directory);
+	void readDirectory(u32 messagePointer, Handle directory);
+
 public:
 	Kernel(CPU& cpu, Memory& mem, GPU& gpu);
 	void initializeFS() { return serviceManager.initializeFS(); }

include/renderer_gl/renderer_gl.hpp

@@ -95,5 +95,5 @@ public:
 	void setColourBufferLoc(u32 loc) { colourBufferLoc = loc; }
 	void setDepthBufferLoc(u32 loc) { depthBufferLoc = loc; }
 
-	static constexpr u32 vertexBufferSize = 0x1500;
+	static constexpr u32 vertexBufferSize = 0x10000;
 };