Start adding a basic /proc filesystem and a "ps" utility.

Kernel/ProcFileSystem.cpp

@@ -0,0 +1,29 @@
+#include "ProcFileSystem.h"
+#include <AK/StdLib.h>
+
+RetainPtr<ProcFileSystem> ProcFileSystem::create()
+{
+    return adopt(*new ProcFileSystem);
+}
+
+ProcFileSystem::ProcFileSystem()
+{
+}
+
+ProcFileSystem::~ProcFileSystem()
+{
+}
+
+bool ProcFileSystem::initialize()
+{
+    SyntheticFileSystem::initialize();
+    addFile(createGeneratedFile("summary", [] {
+        return String("Process summary!").toByteBuffer();
+    }));
+    return true;
+}
+
+const char* ProcFileSystem::className() const
+{
+    return "procfs";
+}