Libraries: Move #pragma once above include headers

The #pragma once was placed after the #include directives instead of
immediately after the copyright comment, inconsistent with every other
header file

Libraries/LibGC/HeapHashTable.h

@@ -4,12 +4,12 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#pragma once
+
 #include <AK/HashTable.h>
 #include <LibGC/Cell.h>
 #include <LibGC/CellAllocator.h>
 
-#pragma once
-
 namespace GC {
 
 template<typename T>

Libraries/LibGfx/Font/FontVariationSettings.h

@@ -4,13 +4,13 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#pragma once
+
 #include <AK/HashMap.h>
 #include <AK/QuickSort.h>
 #include <AK/Vector.h>
 #include <LibGfx/FourCC.h>
 
-#pragma once
-
 namespace Gfx {
 
 struct FontVariationAxis {

Libraries/LibIPC/Concepts.h

@@ -4,6 +4,8 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#pragma once
+
 #include <AK/HashMap.h>
 #include <AK/Optional.h>
 #include <AK/Span.h>
@@ -11,8 +13,6 @@
 #include <AK/Vector.h>
 #include <LibCore/SharedCircularQueue.h>
 
-#pragma once
-
 // These concepts are used to help the compiler distinguish between specializations that would be
 // ambiguous otherwise. For example, if the specializations for int and Vector<T> were declared as
 // follows:

Libraries/LibWeb/CSS/FontComputer.h

@@ -8,6 +8,8 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#pragma once
+
 #include <LibGC/CellAllocator.h>
 #include <LibGfx/FontCascadeList.h>
 #include <LibWeb/CSS/Fetch.h>
@@ -18,8 +20,6 @@
 #include <LibWeb/Forward.h>
 #include <LibWeb/PixelUnits.h>
 
-#pragma once
-
 namespace Web::CSS {
 
 struct FontFaceKey;

Libraries/LibWeb/CSS/FontFeatureData.h

@@ -5,13 +5,13 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#pragma once
+
 #include <AK/FlyString.h>
 #include <AK/HashMap.h>
 #include <LibGfx/ShapeFeature.h>
 #include <LibWeb/Forward.h>
 
-#pragma once
-
 namespace Web::CSS {
 
 enum class FontFeatureValueType : u8 {

Libraries/LibWeb/Painting/SVGMaskable.h

@@ -4,12 +4,12 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#pragma once
+
 #include <LibGfx/Forward.h>
 #include <LibWeb/Forward.h>
 #include <LibWeb/PixelUnits.h>
 
-#pragma once
-
 namespace Web::Painting {
 
 class SVGMaskable {