includes/std: Moved stdlib to std folder, added all builtin functions

includes/std/ptr.pat

@@ -0,0 +1,17 @@
+#pragma once
+
+namespace std::ptr {
+
+    fn relative_to_pointer(u128 offset) {
+        return $;
+    };
+
+    fn relative_to_parent(u128 offset) {
+        return addressof(parent);
+    };
+
+    fn relative_to_end(u128 offset) {
+        return std::mem::size() - offset * 2;
+    };
+
+}