Add TechnicPad macropad (qmk#23238)

keyboards/handwired/technicpad/info.json

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+{
+    "manufacturer": "nwhirschfeld",
+    "keyboard_name": "TechnicPad",
+    "maintainer": "nwhirschfeld",
+    "build": {
+        "lto": true
+    },
+    "development_board": "promicro",
+    "features": {
+        "bootmagic": true,
+        "extrakey": true,
+        "mousekey": true
+    },
+    "matrix_pins": {
+        "direct": [
+            ["D1"],
+            ["D0"],
+            ["D4"],
+            ["C6"]
+        ]
+    },
+    "url": "https://github.com/nwhirschfeld/TechnicPad",
+    "usb": {
+        "device_version": "0.0.1",
+        "pid": "0x5450",
+        "vid": "0x4E57"
+    },
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+                {"label": "D1", "matrix": [0, 0], "x": 0, "y": 0},
+                {"label": "D0", "matrix": [1, 0], "x": 0, "y": 1},
+                {"label": "D4", "matrix": [2, 0], "x": 1, "y": 0},
+                {"label": "C6", "matrix": [3, 0], "x": 1, "y": 1}
+            ]
+        }
+    }
+}

keyboards/handwired/technicpad/keymaps/default/keymap.json

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+{
+    "keyboard": "technicpad",
+    "keymap": "default",
+    "layers": [
+        ["KC_A", "KC_B", "KC_C", "KC_D"]
+    ],
+    "layout": "LAYOUT"
+}

keyboards/handwired/technicpad/keymaps/via/keymap.json

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+{
+    "keyboard": "technicpad",
+    "keymap": "via",
+    "config": {
+        "features": {
+            "via": true
+        }
+    },
+    "layers": [
+        ["KC_A", "KC_B", "KC_C", "KC_D"]
+    ],
+    "layout": "LAYOUT"
+}

keyboards/handwired/technicpad/readme.md

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+# TechnicPad
+
+![TechnicPad](https://i.imgur.com/LPD0KSL.jpg)
+
+A 4% (2x2) macropad, that is compatible to technic building blocks. 
+
+* Keyboard Maintainer: [Niclas Hirschfeld](https://github.com/nwhirschfeld)
+* Hardware Supported: Pro Micro boards
+* Hardware Availability: for now TechnicPad is handwired and uses an Arduino pro micro. [TechnicPad repository](https://github.com/nwhirschfeld/TechnicPad) 
+
+Make example for this keyboard (after setting up your build environment):
+
+    make handwired/technicpad:default
+
+Flashing example for this keyboard:
+
+    make handwired/technicpad:default:flash
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+## Bootloader
+
+Enter the bootloader in 3 ways:
+
+* **Bootmagic reset**: Hold down the upper left key and plug in the keyboard
+* **Physical reset**: Short the _RST_ and _GND_ pins of the PCB
+* **Keycode in layout**: Press the key mapped to QK_BOOT if it is available

keyboards/handwired/technicpad/rules.mk

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+# This file intentionally left blank