Kernel: Rewrite basically all current disk io stuff

This is a big commit that was kinda hard to split to smaller ones.

Essentially we now look at all the mass storage devices from PCI
and initialize (P)ATA devices. This doesn't provide any more functionality
but better abstractions and everything doesn't have to be on its old
default port that might be different for modern computers.

kernel/include/kernel/Storage/StorageDevice.h

@@ -0,0 +1,59 @@
+#pragma once
+
+#include <BAN/Vector.h>
+
+namespace Kernel
+{
+
+	struct GUID
+	{
+		uint32_t data1;
+		uint16_t data2;
+		uint16_t data3;
+		uint8_t data4[8];
+	};
+
+	class StorageDevice
+	{
+	public:
+		struct Partition
+		{
+			Partition(StorageDevice&, const GUID&, const GUID&, uint64_t, uint64_t, uint64_t, const char*);
+
+			const GUID& type() const { return m_type; }
+			const GUID& guid() const { return m_guid; }
+			uint64_t lba_start() const { return m_lba_start; }
+			uint64_t lba_end() const { return m_lba_end; }
+			uint64_t attributes() const { return m_attributes; }
+			const char* name() const { return m_name; }
+			const StorageDevice& device() const { return m_device; }
+
+			BAN::ErrorOr<void> read_sectors(uint64_t lba, uint8_t sector_count, uint8_t* buffer);
+			bool is_used() const { uint8_t zero[16] {}; return memcmp(&m_type, zero, 16); }
+
+		private:
+			StorageDevice& m_device;
+			const GUID m_type;
+			const GUID m_guid;
+			const uint64_t m_lba_start;
+			const uint64_t m_lba_end;
+			const uint64_t m_attributes;
+			char m_name[36 * 3 + 1];
+		};
+
+	public:
+		virtual ~StorageDevice() {}
+
+		BAN::ErrorOr<void> initialize_partitions();
+
+		virtual BAN::ErrorOr<void> read_sectors(uint64_t lba, uint8_t sector_count, uint8_t* buffer) = 0;
+		virtual uint32_t sector_size() const = 0;
+		virtual uint64_t total_size() const = 0;
+
+		BAN::Vector<Partition>& partitions() { return m_partitions; }
+
+	private:
+		BAN::Vector<Partition> m_partitions;
+	};
+
+}