Add Wave keyboard (#22054)

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

keyboards/etiennecollin/wave/keymaps/default/config.h

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+/* Copyright 2023 Etienne Collin (@etiennecollin)
+ *
+ * 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 3 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 <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// Activate caps word by pressing Left Shift + Right Shift
+#define BOTH_SHIFTS_TURNS_ON_CAPS_WORD
+
+// Enable rapid switch from tap to hold, disables double tap hold auto-repeat
+#define QUICK_TAP_TERM 0
+
+// Maximum time between taps of tap dances
+#define TAPPING_TERM 175
+
+// Perform hold action if pressing a dual-role key, tapping another key and
+// releasing the dual-role key withing tapping term
+#define PERMISSIVE_HOLD
+
+// Perform hold action if pressing a dual-role key, pressing another key,
+// releasing the dual-role key and releasing the other key withing tapping term
+#define HOLD_ON_OTHER_KEY_PRESS

keyboards/etiennecollin/wave/keymaps/default/keymap.json

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+{
+    "version": 1,
+    "author": "etiennecollin",
+    "keyboard": "etiennecollin/wave",
+    "notes": "This is a keymap file for etiennecollin/wave",
+    "keymap": "default",
+    "layout": "LAYOUT_split_3x5_3",
+    "config": {
+        "features": {
+            "caps_word": true
+        }
+    },
+    "layers": [
+        [
+            "KC_Q",         "KC_W",         "KC_E",         "KC_R",         "KC_T",     "KC_Y",    "KC_U",          "KC_I",         "KC_O",         "KC_P",
+            "LGUI_T(KC_A)", "LALT_T(KC_S)", "LCTL_T(KC_D)", "LSFT_T(KC_F)", "KC_G",     "KC_H",    "LSFT_T(KC_J)",  "LCTL_T(KC_K)", "LALT_T(KC_L)", "LGUI_T(KC_SCLN)",
+            "KC_Z",         "KC_X",         "KC_C",         "KC_V",         "KC_B",     "KC_N",    "KC_M",          "KC_COMM",      "KC_DOT",       "KC_SLSH",
+                            "KC_ESC",       "KC_SPC",       "KC_TAB",       "KC_ENT",   "KC_BSPC", "MO(1)"
+        ],
+        [
+            "KC_1",         "KC_2",         "KC_3",         "KC_4",         "KC_5",     "KC_6",    "KC_7",          "KC_8",         "KC_9",         "KC_0",
+            "KC_EXLM",      "KC_AT",        "KC_HASH",      "KC_DLR",       "KC_PERC",  "KC_CIRC", "KC_AMPR",       "KC_ASTR",      "KC_LPRN",      "KC_RPRN",
+            "XXXXXXX",      "XXXXXXX",      "XXXXXXX",      "XXXXXXX",      "XXXXXXX",  "XXXXXXX", "XXXXXXX",       "XXXXXXX",      "XXXXXXX",      "XXXXXXX",
+                            "XXXXXXX",      "XXXXXXX",      "XXXXXXX",      "XXXXXXX",  "XXXXXXX", "_______"
+        ]
+    ]
+}

keyboards/etiennecollin/wave/keymaps/default/readme.md

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+# Default keymap
+
+This is a really simple QWERTY keymap with a single number/symbol layer.
+It uses home row modifiers and the caps word feature because of the limited number of keys.
+
+For a more complete layout, see the `feature` layout.