add basic Sega 2P panels and decorative plates

because why not have them?

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

src/panels/inset/sega-2p-panel.scad

@@ -0,0 +1,17 @@
+/* A top panel in the very popular Sega 2P layout.
+ *
+ * SPDX-FileCopyrightText: © 2025 Brian S. Stephan <bss@incorporeal.org>
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+include <parameters.scad>
+include <components.scad>
+
+module sega_2p_panel() {
+	difference() {
+		panel();
+		sega_2p();
+	}
+}
+
+sega_2p_panel();