naming consistency: panels are top/bottom

vertical planes that make up the frame are either sides or front/back

Signed-off-by: Brian S. Stephan <bss@incorporeal.org>

src/frames/pieces/extended/front-or-back-clean-for-extended-side.scad

@@ -0,0 +1,18 @@
+/*
+ * SPDX-FileCopyrightText: © 2024 Brian S. Stephan <bss@incorporeal.org>
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+include <parameters.scad>
+include <components.scad>
+use <frames/pieces/box/front-or-back.scad>
+
+module front_or_back_box_frame_piece_for_extended_side() {
+	difference() {
+		front_or_back_box_frame_piece();
+		// ...minus the frame wall and lip on the left
+		translate([-frame_x/2+frame_wall/2, 0, 0]) cube([frame_wall, frame_y, frame_z], center=true);
+	}
+}
+
+front_or_back_box_frame_piece_for_extended_side();