[Keyboard] Add pluto12 (#15369)

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Ryan <fauxpark@gmail.com>

keyboards/psuieee/pluto12/info.json

@@ -0,0 +1,23 @@
+{
+    "keyboard_name": "pluto12",
+    "url": "https://github.com/psuieee/pluto12",
+    "maintainer": "wymcg",
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+                { "label": "M1", "x": 0, "y": 0 },
+                { "label": "M2", "x": 1, "y": 0 },
+                { "label": "M3", "x": 2, "y": 0 },
+                { "label": "M4", "x": 3, "y": 0 },
+                { "label": "M5", "x": 0, "y": 1 },
+                { "label": "M6", "x": 1, "y": 1 },
+                { "label": "M7", "x": 2, "y": 1 },
+                { "label": "M8", "x": 3, "y": 1 },
+                { "label": "M9", "x": 0, "y": 2 },
+                { "label": "M10", "x": 1, "y": 2 },
+                { "label": "M11", "x": 2, "y": 2 },
+                { "label": "M12", "x": 3, "y": 2 }
+            ]
+        }
+    }
+}