Everywhere: Move global Kernel pattern code to Kernel/Library directory

This has KString, KBuffer, DoubleBuffer, KBufferBuilder, IOWindow,
UserOrKernelBuffer and ScopedCritical classes being moved to the
Kernel/Library subdirectory.

Also, move the panic and assertions handling code to that directory.

Kernel/Memory/MemoryManager.cpp

@@ -15,15 +15,15 @@
 #include <Kernel/Heap/kmalloc.h>
 #include <Kernel/InterruptDisabler.h>
 #include <Kernel/KSyms.h>
+#include <Kernel/Library/Panic.h>
+#include <Kernel/Library/StdLib.h>
 #include <Kernel/Memory/AnonymousVMObject.h>
 #include <Kernel/Memory/MemoryManager.h>
 #include <Kernel/Memory/PhysicalRegion.h>
 #include <Kernel/Memory/SharedInodeVMObject.h>
 #include <Kernel/Multiboot.h>
-#include <Kernel/Panic.h>
 #include <Kernel/Prekernel/Prekernel.h>
 #include <Kernel/Sections.h>
-#include <Kernel/StdLib.h>
 #include <Kernel/Tasks/Process.h>
 
 extern u8 start_of_kernel_image[];

Kernel/Memory/PhysicalRegion.cpp

@@ -5,7 +5,7 @@
  */
 
 #include <AK/BuiltinWrappers.h>
-#include <Kernel/Assertions.h>
+#include <Kernel/Library/Assertions.h>
 #include <Kernel/Memory/MemoryManager.h>
 #include <Kernel/Memory/PhysicalRegion.h>
 #include <Kernel/Memory/PhysicalZone.h>

Kernel/Memory/Region.cpp

@@ -10,11 +10,11 @@
 #include <Kernel/Debug.h>
 #include <Kernel/FileSystem/Inode.h>
 #include <Kernel/InterruptDisabler.h>
+#include <Kernel/Library/Panic.h>
 #include <Kernel/Memory/AnonymousVMObject.h>
 #include <Kernel/Memory/MemoryManager.h>
 #include <Kernel/Memory/Region.h>
 #include <Kernel/Memory/SharedInodeVMObject.h>
-#include <Kernel/Panic.h>
 #include <Kernel/Tasks/Process.h>
 #include <Kernel/Tasks/Scheduler.h>
 #include <Kernel/Tasks/Thread.h>

Kernel/Memory/Region.h

@@ -11,7 +11,7 @@
 #include <AK/IntrusiveList.h>
 #include <AK/IntrusiveRedBlackTree.h>
 #include <Kernel/Forward.h>
-#include <Kernel/KString.h>
+#include <Kernel/Library/KString.h>
 #include <Kernel/Library/LockWeakable.h>
 #include <Kernel/Locking/LockRank.h>
 #include <Kernel/Memory/PageFaultResponse.h>

Kernel/Memory/RingBuffer.cpp

@@ -4,9 +4,9 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <Kernel/Library/UserOrKernelBuffer.h>
 #include <Kernel/Memory/MemoryManager.h>
 #include <Kernel/Memory/RingBuffer.h>
-#include <Kernel/UserOrKernelBuffer.h>
 
 namespace Kernel::Memory {
 

Kernel/Memory/RingBuffer.h

@@ -6,8 +6,8 @@
 
 #pragma once
 
+#include <Kernel/Library/UserOrKernelBuffer.h>
 #include <Kernel/Memory/PhysicalAddress.h>
-#include <Kernel/UserOrKernelBuffer.h>
 
 namespace Kernel::Memory {