[Keyboard] Add Mixi (#9364)

* [Keyboard] Add Mixi

Co-authored-by: Ryan <fauxpark@gmail.com>

Co-authored-by: Ryan <fauxpark@gmail.com>

keyboards/mixi/info.json

@@ -0,0 +1,22 @@
+{
+    "keyboard_name": "Mixi",
+    "url": "https://tokopedia.com/sell-stuffs",
+    "maintainer": "ohchiko",
+    "width": 3,
+    "height": 3,
+    "layouts": {
+        "LAYOUT": {
+            "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}
+            ]
+        }
+    }
+}