Introduce Column interface for the right alignment names

Author: rolf-yoast

lib/cli/table/Column.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace cli\table;
+
+interface Column {
+
+	const ALIGN_RIGHT  = STR_PAD_LEFT;
+	const ALIGN_LEFT   = STR_PAD_RIGHT;
+	const ALIGN_CENTER = STR_PAD_BOTH;
+}