Kernel: Split the ProcFS core file into smaller components

Author: https://github.com/supercomputer7
Commit: 3906dd3aa3
Pull-request: https://github.com/SerenityOS/serenity/pull/15771
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/bgianfo

Kernel/ProcessExposed.cpp

@@ -5,9 +5,8 @@
  */
 
 #include <Kernel/Debug.h>
-#include <Kernel/Devices/BlockDevice.h>
-#include <Kernel/FileSystem/ProcFS.h>
-#include <Kernel/FileSystem/VirtualFileSystem.h>
+#include <Kernel/FileSystem/ProcFS/DirectoryInode.h>
+#include <Kernel/FileSystem/ProcFS/LinkInode.h>
 #include <Kernel/KBufferBuilder.h>
 #include <Kernel/PerformanceEventBuffer.h>
 #include <Kernel/Process.h>