[Keymap] Add The Uni Utility Belt Keymap (#19411)

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Peter Park <peter@Peters-MacBook-Air.local>

keyboards/stenokeyboards/the_uni/keymaps/utility_belt/keymap.c

@@ -0,0 +1,41 @@
+/*
+Copyright 2022 Peter C. Park <peter@stenokeyboards.com>
+
+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
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include QMK_KEYBOARD_H
+#include "keymap_steno.h"
+
+enum uni_layers {
+    _PLOVER,
+    _UTILITY,
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+    [_PLOVER] = LAYOUT(
+        STN_S1,  STN_TL,  STN_PL,  STN_HL,  STN_ST1,  STN_ST3,  STN_FR,  STN_PR,  STN_LR,  STN_TR,  STN_DR ,
+        STN_S2,  STN_KL,  STN_WL,  STN_RL,  STN_ST2,  STN_ST4,  STN_RR,  STN_BR,  STN_GR,  STN_SR,  STN_ZR ,
+                          MO(_UTILITY),  STN_A,   STN_O,    STN_E,    STN_U,   STN_N2),
+    [_UTILITY] = LAYOUT(
+        XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+        KC_LSFT,  KC_LCTL,  KC_LALT,  KC_LCMD,  KC_SPC, KC_VOLD,  KC_LEFT, KC_DOWN, KC_UP ,KC_RIGHT,  KC_VOLU,
+                          _______,  STN_N1,   XXXXXXX,    XXXXXXX,    XXXXXXX,   XXXXXXX),
+
+};
+
+void keyboard_post_init_user(void) {
+    steno_set_mode(STENO_MODE_GEMINI); // or STENO_MODE_BOLT
+ }

keyboards/stenokeyboards/the_uni/keymaps/utility_belt/readme.md

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+# Utility Bar Uni Layout
+
+## Default layer
+
+![The Uni Layout Image](https://i.imgur.com/z9AfjYZ.png)
+
+## Utility bar layer
+
+![The Uni Layout Image](https://i.imgur.com/JcU2Frh.png)
+
+
+Use this layout if you want to do modifier+mouse actions like shift+click. There is also arrows and volume keys on the right side.
+
+To use, press and hold the bottom left number key, which temporarily switches the layer to the utility bar layer.