Add ortho_3x3 community layout (#19210)

layouts/default/ortho_3x3/default_ortho_3x3/keymap.c

@@ -0,0 +1,18 @@
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    /*
+     * ┌───┬───┬───┐
+     * │ A │ B │ C │
+     * ├───┼───┼───┤
+     * │ D │ E │ F │
+     * ├───┼───┼───┤
+     * │ G │ H │ I │
+     * └───┴───┴───┘
+     */
+    [0] = LAYOUT_ortho_3x3(
+        KC_A,    KC_B,    KC_C,
+        KC_D,    KC_E,    KC_F,
+        KC_G,    KC_H,    KC_I
+    )
+};

layouts/default/ortho_3x3/info.json

@@ -0,0 +1,22 @@
+{
+    "keyboard_name": "3x3 ortholinear layout",
+    "url": "",
+    "maintainer": "qmk",
+    "layouts": {
+        "LAYOUT_ortho_3x3": {
+            "layout": [
+                {"x":0, "y":0},
+                {"x":1, "y":0},
+                {"x":2, "y":0},
+
+                {"x":0, "y":1},
+                {"x":1, "y":1},
+                {"x":2, "y":1},
+
+                {"x":0, "y":2},
+                {"x":1, "y":2},
+                {"x":2, "y":2}
+            ]
+        }
+    }
+}

layouts/default/ortho_3x3/layout.json

@@ -0,0 +1,3 @@
+["","",""],
+["","",""],
+["","",""]

layouts/default/ortho_3x3/readme.md

@@ -0,0 +1,3 @@
+# ortho_3x3
+
+    LAYOUT_ortho_3x3

layouts/default/readme.md

@@ -1059,6 +1059,17 @@ LAYOUT_ortho_2x6
 └───┴───┴───┴───┴───┴───┘
 ```
 
+```
+LAYOUT_ortho_3x3
+┌───┬───┬───┐
+│   │   │   │
+├───┼───┼───┤
+│   │   │   │
+├───┼───┼───┤
+│   │   │   │
+└───┴───┴───┘
+```
+
 ```
 LAYOUT_ortho_3x10
 ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┐