AK: Reduce header dependency graph of String.h

String.h no longer pulls in StringView.h. We do this by moving a bunch
of String functions out-of-line.

Kernel/FileSystem/Custody.cpp

@@ -25,6 +25,7 @@
  */
 
 #include <AK/StringBuilder.h>
+#include <AK/StringView.h>
 #include <AK/Vector.h>
 #include <Kernel/FileSystem/Custody.h>
 #include <Kernel/FileSystem/Inode.h>

Kernel/FileSystem/DevPtsFS.cpp

@@ -25,6 +25,7 @@
  */
 
 #include <AK/StringBuilder.h>
+#include <AK/StringView.h>
 #include <Kernel/FileSystem/DevPtsFS.h>
 #include <Kernel/FileSystem/VirtualFileSystem.h>
 #include <Kernel/TTY/SlavePTY.h>

Kernel/FileSystem/DiskBackedFileSystem.cpp

@@ -24,6 +24,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include <AK/StringView.h>
 #include <Kernel/Arch/i386/CPU.h>
 #include <Kernel/Devices/BlockDevice.h>
 #include <Kernel/FileSystem/DiskBackedFileSystem.h>

Kernel/FileSystem/Ext2FileSystem.cpp

@@ -28,6 +28,7 @@
 #include <AK/BufferStream.h>
 #include <AK/HashMap.h>
 #include <AK/StdLibExtras.h>
+#include <AK/StringView.h>
 #include <Kernel/Devices/BlockDevice.h>
 #include <Kernel/FileSystem/Ext2FileSystem.h>
 #include <Kernel/FileSystem/FileDescription.h>

Kernel/FileSystem/FIFO.cpp

@@ -26,6 +26,7 @@
 
 #include <AK/HashTable.h>
 #include <AK/StdLibExtras.h>
+#include <AK/StringView.h>
 #include <Kernel/FileSystem/FIFO.h>
 #include <Kernel/FileSystem/FileDescription.h>
 #include <Kernel/Lock.h>

Kernel/FileSystem/File.cpp

@@ -24,6 +24,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include <AK/StringView.h>
 #include <Kernel/FileSystem/File.h>
 #include <Kernel/FileSystem/FileDescription.h>
 

Kernel/FileSystem/FileSystem.cpp

@@ -27,6 +27,7 @@
 #include <AK/Assertions.h>
 #include <AK/HashMap.h>
 #include <AK/StringBuilder.h>
+#include <AK/StringView.h>
 #include <Kernel/FileSystem/FileSystem.h>
 #include <Kernel/FileSystem/Inode.h>
 #include <Kernel/Net/LocalSocket.h>

Kernel/FileSystem/Inode.cpp

@@ -26,6 +26,7 @@
 
 #include <AK/NonnullRefPtrVector.h>
 #include <AK/StringBuilder.h>
+#include <AK/StringView.h>
 #include <Kernel/FileSystem/Custody.h>
 #include <Kernel/FileSystem/Inode.h>
 #include <Kernel/FileSystem/InodeWatcher.h>

Kernel/FileSystem/InodeFile.cpp

@@ -24,6 +24,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include <AK/StringView.h>
 #include <Kernel/FileSystem/FileDescription.h>
 #include <Kernel/FileSystem/Inode.h>
 #include <Kernel/FileSystem/InodeFile.h>