Implement stow config file and folder unwrapping

Move includes to their own folder, config.php will otherwise be included
and cleans up nicely

php/includes/functions.php

@@ -0,0 +1,11 @@
+<?php
+
+function path(...$segments): string
+{
+    return implode(DIRECTORY_SEPARATOR, $segments);
+}
+
+function line(string $line): void
+{
+    echo $line . PHP_EOL;
+}