Kernel: Add support for text mode terminal

This probably won't be used at all but it was so simple and made me do
really nice refactorings so i decided to add it :)

kernel/include/kernel/BananBootloader.h

@@ -3,7 +3,8 @@
 #include <stdint.h>
 
 #define BANAN_BOOTLOADER_MAGIC	0xD3C60CFF
-#define BANAN_BOOTLOADER_FB_RGB	1
+#define BANAN_BOOTLOADER_FB_RGB		1
+#define BANAN_BOOTLOADER_FB_TEXT	2
 
 struct BananBootFramebufferInfo
 {

kernel/include/kernel/BootInfo.h

@@ -15,6 +15,7 @@ namespace Kernel
 			None,
 			Unknown,
 			RGB,
+			Text,
 		};
 
 		paddr_t  address;

kernel/include/kernel/Terminal/TextModeTerminal.h

@@ -0,0 +1,42 @@
+#pragma once
+
+#include <kernel/Terminal/TerminalDriver.h>
+
+namespace Kernel
+{
+
+	class TextModeTerminalDriver final : public TerminalDriver
+	{
+	public:
+		static BAN::ErrorOr<BAN::RefPtr<TextModeTerminalDriver>> create_from_boot_info();
+		~TextModeTerminalDriver();
+
+		uint32_t width() const override { return m_width; }
+		uint32_t height() const override { return m_height; }
+
+		void putchar_at(uint16_t, uint32_t, uint32_t, Color, Color) override;
+		void clear(Color) override;
+
+		void set_cursor_shown(bool) override;
+		void set_cursor_position(uint32_t, uint32_t) override;
+
+	private:
+		TextModeTerminalDriver(paddr_t paddr, uint32_t width, uint32_t height, uint32_t pitch)
+			: m_paddr(paddr)
+			, m_width(width)
+			, m_height(height)
+			, m_pitch(pitch)
+		{}
+
+		BAN::ErrorOr<void> initialize();
+
+	private:
+		const paddr_t m_paddr;
+		const uint32_t m_width;
+		const uint32_t m_height;
+		const uint32_t m_pitch;
+		vaddr_t m_vaddr { 0 };
+		static constexpr Color s_cursor_color = TerminalColor::BRIGHT_WHITE;
+	};
+
+}

kernel/include/kernel/multiboot2.h

@@ -11,7 +11,8 @@
 #define MULTIBOOT2_TAG_OLD_RSDP		14
 #define MULTIBOOT2_TAG_NEW_RSDP		15
 
-#define MULTIBOOT2_FRAMEBUFFER_TYPE_RGB	1
+#define MULTIBOOT2_FRAMEBUFFER_TYPE_RGB		1
+#define MULTIBOOT2_FRAMEBUFFER_TYPE_TEXT	2
 
 #define MULTIBOOT2_MAGIC 0x36d76289