[Keyboard] Add swap hands support for Technik_O (#15477)

Co-authored-by: filterpaper <filterpaper@localhost>

keyboards/boardsource/technik_o/technik_o.c

@@ -1,4 +1,5 @@
 /* Copyright 2020 Boardsource
+ * Copyright 2021 @filterpaper
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -15,6 +16,7 @@
  */
 
 #include "technik_o.h"
+
 #ifdef RGB_MATRIX_ENABLE
 led_config_t g_led_config = { {
     { 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21},
@@ -36,3 +38,13 @@ led_config_t g_led_config = { {
 } };
 #endif
 
+#ifdef SWAP_HANDS_ENABLE
+__attribute__ ((weak))
+const keypos_t PROGMEM hand_swap_config[MATRIX_ROWS][MATRIX_COLS] = {
+    {{11, 0}, {10, 0}, {9, 0}, {8, 0}, {7, 0}, {6, 0}, {5, 0}, {4, 0}, {3, 0}, {2, 0}, {1, 0}, {0, 0}},
+    {{11, 1}, {10, 1}, {9, 1}, {8, 1}, {7, 1}, {6, 1}, {5, 1}, {4, 1}, {3, 1}, {2, 1}, {1, 1}, {0, 1}},
+    {{11, 2}, {10, 2}, {9, 2}, {8, 2}, {7, 2}, {6, 2}, {5, 2}, {4, 2}, {3, 2}, {2, 2}, {1, 2}, {0, 2}},
+    {{11, 3}, {10, 3}, {9, 3}, {8, 3}, {7, 3}, {6, 3}, {5, 3}, {4, 3}, {3, 3}, {2, 3}, {1, 3}, {0, 3}}
+};
+#endif
+