Adding the Zeropad keyboard

keyboards/handwired/zeropad/keyboard.json

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+{
+    "manufacturer": "Leon Sieber",
+    "keyboard_name": "ZeroPad",
+    "maintainer": "diffrentGuesser",
+    "development_board": "promicro",
+    "diode_direction": "COL2ROW",
+    "features": {
+        "bootmagic": true,
+        "command": false,
+        "console": false,
+        "extrakey": true,
+        "mousekey": true,
+        "nkro": true
+    },
+    "matrix_pins": {
+        "cols": ["D1", "D0", "D4"],
+        "rows": ["C6", "D7", "E6"],
+    },
+    "url": "",
+    "usb": {
+        "device_version": "1.0.0",
+        "pid": "0x0000",
+        "vid": "0x5A50"
+    },
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+                {"matrix": [0, 0], "x": 0, "y": 0},
+                {"matrix": [0, 1], "x": 1, "y": 0},
+                {"matrix": [0, 2], "x": 2, "y": 0},
+                {"matrix": [1, 0], "x": 0, "y": 1},
+                {"matrix": [1, 1], "x": 1, "y": 1},
+                {"matrix": [1, 2], "x": 2, "y": 1},
+                {"matrix": [2, 0], "x": 0, "y": 2},
+                {"matrix": [2, 1], "x": 1, "y": 2},
+                {"matrix": [2, 2], "x": 2, "y": 2}
+            ]
+        }
+    }
+}

keyboards/handwired/zeropad/keymaps/default/keymap.c

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+// Copyright 2023 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+    [0] = LAYOUT(
+        KC_1,   KC_2,   KC_3,
+        KC_4,   KC_5,   KC_6, 
+        KC_7,   KC_8,   KC_9
+    )
+};

keyboards/handwired/zeropad/readme.md

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+# ZeroPad
+
+ZeroPad:
+![ZeroPad](https://github.com/user-attachments/assets/224aa55a-045b-4bb9-b6e9-34f092ced5c4)
+
+
+*This keyboard is inspired by the scotto9 from Joe Scotto. This keyboard is compatible with via and has 4 layers of keybinds (24 keybinds - 4x8 + 1 per layer for changing the layer).*
+* Keyboard Maintainer: [Leon Sieber](https://github.com/diffrentGuesser)
+* Hardware Supported: Pro Micro, 3 pin switches
+* Hardware Availability: [Pro Micro](https://de.aliexpress.com/item/32846843498.html?spm=a2g0o.cart.0.0.146d4ae4kCjqDY&mp=1&gatewayAdapt=glo2deu), [switches](https://de.aliexpress.com/item/1005007135709029.html?spm=a2g0o.cart.0.0.146d4ae4kCjqDY&mp=1&gatewayAdapt=glo2deu)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make handwired/zeropad:default
+
+
+Flashing example for this keyboard:
+
+    make handwired/zeropad: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:
+
+* **Physical short**: Short the GND and the RST pins to flash the keyboard new.
+  * This will put the board into bootloader mode, allowing you to flash a new firmware.
+  * Make sure you disconnect and reconnect the cable after shorting the pins.