[Keyboard] support for Stack Overflow The Key from Drop - adapted from @frap129 (#15520)

* support for Stack Overflow The Key from Drop - adapted from @frap129

* addressing code review comments

there's still some issues related to LEDs so i think for now the best
course of action is to remove those items until we can get better
details on the assembly of the board.

* removing this on the correct branch

* cleaning up more code review comments, moving to simpler/common formats for maps

* it is a C not a G fool

* well, looks like you can do it this way too for booting/dfu

* fixing missing newline for gcc to be quiet

* removing busted links

* formatting to match current template

* Update keyboards/massdrop/thekey/rules.mk

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

Co-authored-by: Andy Piper <andypiper@users.noreply.github.com>
Co-authored-by: Ryan <fauxpark@gmail.com>

keyboards/massdrop/thekey/info.json

@@ -0,0 +1,14 @@
+{
+    "keyboard_name": "The Key",
+    "url": "https://drop.com/buy/stack-overflow-the-key-macropad",
+    "maintainer": "massdrop",
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+                { "label": "K00 (D4,D2)", "x": 0, "y": 0 },
+                { "label": "K01 (D4,D1)", "x": 1, "y": 0 },
+                { "label": "K02 (D4,D0)", "x": 2, "y": 0 }
+            ]
+        }
+    }
+}