Add RetroPie configs backup from /opt/retropie/configs

키 설정·패드 매핑·에뮬 설정을 sync-configs.sh로 동기화.

Co-authored-by: Cursor <cursoragent@cursor.com>

configs/dreamcast/mappings/evdev_Pro Controller.cfg

@@ -0,0 +1,38 @@
+[emulator]
+mapping_name = Pro Controller
+btn_escape = 290
+
+[dreamcast]
+btn_a = 288
+btn_b = 289
+btn_c =
+btn_d =
+btn_x =
+btn_y = 291
+btn_z =
+btn_start = 292
+btn_dpad1_left =
+btn_dpad1_right =
+btn_dpad1_up =
+btn_dpad1_down =
+btn_dpad2_left =
+btn_dpad2_right =
+btn_dpad2_up =
+btn_dpad2_down =
+axis_x = 0
+axis_y = 1
+axis_trigger_left =
+axis_trigger_right =
+
+[compat]
+btn_trigger_left =
+btn_trigger_right =
+axis_dpad1_x =
+axis_dpad1_y =
+axis_dpad2_x =
+axis_dpad2_y =
+axis_x_inverted = no
+axis_y_inverted = no
+axis_trigger_left_inverted =
+axis_trigger_right_inverted =
+