Add missing header

Author: caksoylar

config/keypos_def/keypos_26keys.h

@@ -0,0 +1,85 @@
+/* This file is copied and then modified from https://github.com/urob/zmk-nodefree-config/blob/973f717c6bbde9cf452a4da88ac9a7f80cdd4bef/keypos_def/keypos_34keys.h
+ * LICENSE for that repo is inlined below.
+
+ * MIT License
+ *
+ * Copyright (c) 2023 Robert U
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/*                              26 KEY MATRIX / LAYOUT MAPPING
+
+  ╭────────────────────┬────────────────────╮ ╭─────────────────────┬─────────────────────╮
+  │      0   1   2   3 │  4   5   6   7     │ │     LT3 LT2 LT1 LT0 │ RT0 RT1 RT2 RT3     │
+  │  8   9  10  11  12 │ 13  14  15  16  17 │ │ LM4 LM3 LM2 LM1 LM0 │ RM0 RM1 RM2 RM3 RM4 │
+  ╰───╮ 18  19  20     │     21  22  23 ╭───╯ ╰───╮ LB3 LB2 LB1     │     RB1 RB2 RB3 ╭───╯
+      ╰───────────╮ 24 │ 25 ╭───────────╯         ╰───────────╮ LH0 │ RH0 ╭───────────╯
+                  ╰────┴────╯                                 ╰─────┴─────╯             */
+
+#pragma once
+
+#define LT0  3  // left-top row
+#define LT1  2
+#define LT2  1
+#define LT3  0
+
+#define RT0  4  // right-top row
+#define RT1  5
+#define RT2  6
+#define RT3  7
+
+#define LM0 12  // left-middle row
+#define LM1 11
+#define LM2 10
+#define LM3  9
+#define LM4  8
+
+#define RM0 13  // right-middle row
+#define RM1 14
+#define RM2 15
+#define RM3 16
+#define RM4 17
+
+#define LB1 20  // left-bottom row
+#define LB2 19
+#define LB3 18
+
+#define RB1 21  // right-bottom row
+#define RB2 22
+#define RB3 23
+
+#define LH0 24  // left thumb key
+
+#define RH0 25  // right thumb key
+
+#define KEYS_L LT0 LT1 LT2 LT3     LM0 LM1 LM2 LM3 LM4     LB1 LB2 LB3      // left-hand keys
+#define KEYS_R RT0 RT1 RT2 RT3     RM0 RM1 RM2 RM3 RM4     RB1 RB2 RB3      // right-hand keys
+#define THUMBS         LH0 RH0                                              // thumb keys
+
+#define LAYER_FROM36( \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, \
+    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, \
+    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, \
+              k30, k31, k32, k33, k34, k35            \
+) \
+         k01  k02  k03  k04  k05  k06  k07  k08       \
+    k10  k11  k12  k13  k14  k15  k16  k17  k18  k19  \
+         k21  k22  k23            k26  k27  k28       \
+                        k32  k33