Everywhere: Only use local includes where appropriate

If a local include does not point to a file in the repository, it should
be a system include instead.

Meta/Lagom/Tools/CodeGenerators/LibEDID/GeneratePnpIDs.cpp

@@ -221,7 +221,7 @@ static ErrorOr<void> generate_source(Core::File& file, HashMap<DeprecatedString,
     SourceGenerator generator { builder };
 
     generator.append(R"~~~(
-#include "PnpIDs.h"
+#include <LibEDID/PnpIDs.h>
 
 namespace PnpIDs {
 

Userland/Applications/Piano/RollWidget.cpp

@@ -8,9 +8,9 @@
  */
 
 #include "RollWidget.h"
-#include "LibDSP/Music.h"
 #include "TrackManager.h"
 #include <AK/IntegralMath.h>
+#include <LibDSP/Music.h>
 #include <LibGUI/Event.h>
 #include <LibGUI/Painter.h>
 #include <LibGUI/Scrollbar.h>

Userland/Libraries/LibGfx/Font/OpenType/Tables.h

@@ -8,11 +8,11 @@
 
 #pragma once
 
-#include "AK/Endian.h"
-#include "AK/Forward.h"
 #include <AK/DeprecatedString.h>
+#include <AK/Endian.h>
 #include <AK/Error.h>
 #include <AK/FixedArray.h>
+#include <AK/Forward.h>
 #include <AK/Span.h>
 
 namespace OpenType {

Userland/Libraries/LibVideo/Containers/Matroska/MatroskaDemuxer.cpp

@@ -5,7 +5,7 @@
  */
 
 #include "MatroskaDemuxer.h"
-#include "AK/Debug.h"
+#include <AK/Debug.h>
 
 namespace Video::Matroska {