Libraries: Create top level directory for libraries.

Things were getting a little crowded in the project root, so this patch
moves the Lib*/ directories into Libraries/.

Libraries/LibGUI/GLabel.h

@@ -0,0 +1,38 @@
+#pragma once
+
+#include <LibGUI/GFrame.h>
+#include <SharedGraphics/TextAlignment.h>
+
+class GraphicsBitmap;
+
+class GLabel : public GFrame {
+public:
+    explicit GLabel(GWidget* parent = nullptr);
+    GLabel(const StringView& text, GWidget* parent = nullptr);
+    virtual ~GLabel() override;
+
+    String text() const { return m_text; }
+    void set_text(const StringView&);
+
+    void set_icon(RefPtr<GraphicsBitmap>&&);
+    const GraphicsBitmap* icon() const { return m_icon.ptr(); }
+    GraphicsBitmap* icon() { return m_icon.ptr(); }
+
+    TextAlignment text_alignment() const { return m_text_alignment; }
+    void set_text_alignment(TextAlignment text_alignment) { m_text_alignment = text_alignment; }
+
+    bool should_stretch_icon() const { return m_should_stretch_icon; }
+    void set_should_stretch_icon(bool b) { m_should_stretch_icon = b; }
+
+    void size_to_fit();
+
+    virtual const char* class_name() const override { return "GLabel"; }
+
+private:
+    virtual void paint_event(GPaintEvent&) override;
+
+    String m_text;
+    RefPtr<GraphicsBitmap> m_icon;
+    TextAlignment m_text_alignment { TextAlignment::Center };
+    bool m_should_stretch_icon { false };
+};