LibGfx: Prepare the paint code for fonts whose glyphs are color bitmaps

This patch does three things:
- Font::has_color_bitmaps() (true if CBLC and CBDT are present)
- Glyph now knows when its bitmap comes from a color bitmap font
- Painter draws color bitmap glyphs with the appropriate scaling etc

Userland/Libraries/LibGfx/Font/ScaledFont.h

@@ -71,6 +71,8 @@ public:
 
     virtual RefPtr<Font> with_size(float point_size) const override;
 
+    virtual bool has_color_bitmaps() const override { return m_font->has_color_bitmaps(); }
+
 private:
     NonnullRefPtr<VectorFont> m_font;
     float m_x_scale { 0.0f };