Add clang-format file

Also run it across the whole tree to get everything using the One True Style.
We don't yet run this in an automated fashion as it's a little slow, but
there is a snippet to do so in makeall.sh.

DevTools/VisualBuilder/VBForm.h

@@ -1,11 +1,12 @@
 #pragma once
 
-#include <LibGUI/GWidget.h>
-#include <AK/Vector.h>
 #include "VBWidget.h"
+#include <AK/Vector.h>
+#include <LibGUI/GWidget.h>
 
 class VBForm : public GWidget {
     friend class VBWidget;
+
 public:
     explicit VBForm(const String& name, GWidget* parent = nullptr);
     virtual ~VBForm() override;
@@ -43,7 +44,8 @@ private:
     void add_to_selection(VBWidget&);
     void remove_from_selection(VBWidget&);
     void delete_selected_widgets();
-    template<typename Callback> void for_each_selected_widget(Callback);
+    template<typename Callback>
+    void for_each_selected_widget(Callback);
 
     VBWidget* single_selected_widget();
 

DevTools/VisualBuilder/VBProperty.h

@@ -9,6 +9,7 @@ class VBWidget;
 
 class VBProperty {
     friend class VBWidget;
+
 public:
     VBProperty(VBWidget&, const String& name, const GVariant& value);
     VBProperty(VBWidget&, const String& name, Function<GVariant(const GWidget&)>&& getter, Function<void(GWidget&, const GVariant&)>&& setter);

DevTools/VisualBuilder/VBWidget.h

@@ -1,12 +1,12 @@
 #pragma once
 
-#include <SharedGraphics/Rect.h>
+#include "VBWidgetType.h"
+#include <AK/Function.h>
+#include <AK/HashMap.h>
 #include <AK/Retainable.h>
 #include <AK/Retained.h>
 #include <AK/Weakable.h>
-#include <AK/HashMap.h>
-#include <AK/Function.h>
-#include "VBWidgetType.h"
+#include <SharedGraphics/Rect.h>
 
 class GPainter;
 class GVariant;
@@ -15,7 +15,18 @@ class VBForm;
 class VBProperty;
 class VBWidgetPropertyModel;
 
-enum class Direction { None, Left, UpLeft, Up, UpRight, Right, DownRight, Down, DownLeft };
+enum class Direction
+{
+    None,
+    Left,
+    UpLeft,
+    Up,
+    UpRight,
+    Right,
+    DownRight,
+    Down,
+    DownLeft
+};
 template<typename Callback>
 inline void for_each_direction(Callback callback)
 {
@@ -29,8 +40,10 @@ inline void for_each_direction(Callback callback)
     callback(Direction::DownLeft);
 }
 
-class VBWidget : public Retainable<VBWidget>, public Weakable<VBWidget> {
+class VBWidget : public Retainable<VBWidget>
+    , public Weakable<VBWidget> {
     friend class VBWidgetPropertyModel;
+
 public:
     static Retained<VBWidget> create(VBWidgetType type, VBForm& form) { return adopt(*new VBWidget(type, form)); }
     ~VBWidget();

DevTools/VisualBuilder/VBWidgetPropertyModel.h

@@ -7,7 +7,8 @@ class VBProperty;
 
 class VBWidgetPropertyModel : public GModel {
 public:
-    enum Column {
+    enum Column
+    {
         Name = 0,
         Value,
         __Count

DevTools/VisualBuilder/VBWidgetRegistry.h

@@ -1,9 +1,9 @@
 #pragma once
 
 #include "VBWidgetType.h"
+#include <AK/AKString.h>
 #include <AK/HashMap.h>
 #include <AK/OwnPtr.h>
-#include <AK/AKString.h>
 
 class GWidget;
 class VBProperty;
@@ -11,7 +11,8 @@ class VBWidget;
 
 class VBWidgetRegistry {
 public:
-    template<typename Callback> static void for_each_widget_type(Callback callback)
+    template<typename Callback>
+    static void for_each_widget_type(Callback callback)
     {
         for (unsigned i = 1; i < (unsigned)VBWidgetType::__Count; ++i)
             callback((VBWidgetType)i);

DevTools/VisualBuilder/VBWidgetType.h

@@ -1,6 +1,7 @@
 #pragma once
 
-enum class VBWidgetType {
+enum class VBWidgetType
+{
     None = 0,
     GWidget,
     GButton,