add doio/kb03 (#24815)

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Joel Challis <git@zvecr.com>

keyboards/doio/kb03/keymaps/default/keymap.c

@@ -0,0 +1,44 @@
+// Copyright 2025 DOIO
+// Copyright 2025 ClownFish (@clownfish-og)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+enum my_layers {
+    _BASE,
+    _MOUSE,
+    _MEDIA,
+    _LIGHTS
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [_BASE] = LAYOUT(
+        TO(_MOUSE),
+        KC_1,    KC_2,    KC_3,
+                 KC_ENT
+    ),
+    [_MOUSE] = LAYOUT(
+        TO(_MEDIA),
+        MS_BTN1, MS_BTN3, MS_BTN2,
+                 KC_LCTL
+    ),
+    [_MEDIA] = LAYOUT(
+        TO(_LIGHTS),
+        KC_MRWD, KC_MPLY, KC_MFFD,
+                 KC_MUTE
+    ),
+    [_LIGHTS] = LAYOUT(
+        TO(_BASE),
+        RM_VALD, RM_NEXT, RM_VALU,
+                 RM_TOGG
+    )
+};
+
+#ifdef ENCODER_MAP_ENABLE
+const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][NUM_DIRECTIONS] = {
+    [_BASE]   = { ENCODER_CCW_CW(MS_WHLU, MS_WHLD), ENCODER_CCW_CW(MS_WHLL, MS_WHLR) },
+    [_MOUSE]  = { ENCODER_CCW_CW(MS_LEFT, MS_RGHT), ENCODER_CCW_CW(MS_UP, MS_DOWN) },
+    [_MEDIA]  = { ENCODER_CCW_CW(KC_VOLD, KC_VOLU), ENCODER_CCW_CW(KC_MPRV, KC_MNXT) },
+    [_LIGHTS] = { ENCODER_CCW_CW(RM_SATD, RM_SATU), ENCODER_CCW_CW(RM_HUED, RM_HUEU) }
+};
+#endif