[Keyboard] move niu_mini to /kbdfans (#16112)

keyboards/kbdfans/niu_mini/niu_mini.c

@@ -0,0 +1,19 @@
+#include "niu_mini.h"
+
+#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
+
+void matrix_init_kb(void) {
+    // Turn status LED on
+    setPinOutput(E6);
+    writePinHigh(E6);
+
+    matrix_init_user();
+}