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/Arch/aarch64/CPUID.h

@@ -11,7 +11,7 @@
 #include <AK/Types.h>
 #include <AK/UFixedBigInt.h>
 #include <Kernel/Arch/aarch64/Registers.h>
-#include <Kernel/KString.h>
+#include <Kernel/Library/KString.h>
 
 #include <AK/Platform.h>
 VALIDATE_IS_AARCH64()

Kernel/Arch/aarch64/Exceptions.cpp

@@ -8,7 +8,7 @@
 #include <Kernel/Arch/aarch64/CPU.h>
 #include <Kernel/Arch/aarch64/Processor.h>
 #include <Kernel/Arch/aarch64/Registers.h>
-#include <Kernel/Panic.h>
+#include <Kernel/Library/Panic.h>
 
 extern "C" uintptr_t vector_table_el1;
 

Kernel/Arch/aarch64/Interrupts.cpp

@@ -13,8 +13,8 @@
 #include <Kernel/Interrupts/SharedIRQHandler.h>
 #include <Kernel/Interrupts/UnhandledInterruptHandler.h>
 #include <Kernel/KSyms.h>
-#include <Kernel/Panic.h>
-#include <Kernel/StdLib.h>
+#include <Kernel/Library/Panic.h>
+#include <Kernel/Library/StdLib.h>
 
 namespace Kernel {
 

Kernel/Arch/aarch64/MMU.cpp

@@ -14,7 +14,7 @@
 #include <Kernel/Arch/aarch64/RPi/UART.h>
 #include <Kernel/Arch/aarch64/Registers.h>
 #include <Kernel/BootInfo.h>
-#include <Kernel/Panic.h>
+#include <Kernel/Library/Panic.h>
 #include <Kernel/Sections.h>
 
 // Documentation here for Aarch64 Address Translations

Kernel/Arch/aarch64/Panic.cpp

@@ -6,9 +6,9 @@
 
 #include <Kernel/Arch/Processor.h>
 #include <Kernel/KSyms.h>
-#include <Kernel/Panic.h>
+#include <Kernel/Library/Panic.h>
 
-// FIXME: Merge the code in this file with Kernel/Panic.cpp once the proper abstractions are in place.
+// FIXME: Merge the code in this file with Kernel/Library/Panic.cpp once the proper abstractions are in place.
 
 // Note: This is required here, since __assertion_failed should be out of the Kernel namespace,
 //       but the PANIC macro uses functions that require the Kernel namespace.

Kernel/Arch/aarch64/SafeMem.cpp

@@ -7,7 +7,7 @@
 
 #include <Kernel/Arch/RegisterState.h>
 #include <Kernel/Arch/SafeMem.h>
-#include <Kernel/StdLib.h>
+#include <Kernel/Library/StdLib.h>
 
 #define CODE_SECTION(section_name) __attribute__((section(section_name)))
 

Kernel/Arch/aarch64/ThreadRegisters.h

@@ -7,8 +7,8 @@
 #pragma once
 
 #include <AK/Types.h>
+#include <Kernel/Library/StdLib.h>
 #include <Kernel/Memory/AddressSpace.h>
-#include <Kernel/StdLib.h>
 
 namespace Kernel {