LibDraw: Introduce (formerly known as SharedGraphics.)

Instead of LibGUI and WindowServer building their own copies of the drawing
and graphics code, let's it in a separate LibDraw library.

This avoids building the code twice, and will encourage better separation
of concerns. :^)

SharedGraphics/CharacterBitmap.cpp

@@ -1,16 +0,0 @@
-#include "CharacterBitmap.h"
-
-CharacterBitmap::CharacterBitmap(const char* ascii_data, unsigned width, unsigned height)
-    : m_bits(ascii_data)
-    , m_size(width, height)
-{
-}
-
-CharacterBitmap::~CharacterBitmap()
-{
-}
-
-NonnullRefPtr<CharacterBitmap> CharacterBitmap::create_from_ascii(const char* asciiData, unsigned width, unsigned height)
-{
-    return adopt(*new CharacterBitmap(asciiData, width, height));
-}