Adding SdraKb00 keyboard (qmk#24552)

Co-authored-by: jack <jack@pngu.org>
Co-authored-by: Duncan Sutherland <dunk2k_2000@hotmail.com>

keyboards/sdrakbs/sdrakb00/keyboard.json

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+{
+    "manufacturer": "Diego Andres Rabaioli",
+    "keyboard_name": "sdrakb00",
+    "maintainer": "drabaioli",
+    "bootloader": "atmel-dfu",
+    "diode_direction": "COL2ROW",
+    "encoder": {
+        "rotary": [
+            {"pin_a": "B5", "pin_b": "B6", "resolution": 2}
+        ]
+    },
+    "features": {
+        "bootmagic": true,
+        "encoder": true,
+        "extrakey": true,
+        "mousekey": true,
+        "nkro": true,
+        "rgb_matrix": true
+    },
+    "matrix_pins": {
+        "cols": ["F0", "F1", "F4", "F5"],
+        "rows": ["D4", "D6", "D7"]
+    },
+    "processor": "atmega32u4",
+    "rgb_matrix": {
+        "driver": "ws2812",
+        "layout": [
+            {"matrix": [0, 0], "x": 0, "y": 0, "flags": 4},
+            {"matrix": [0, 1], "x": 16, "y": 0, "flags": 4},
+            {"matrix": [0, 2], "x": 32, "y": 0, "flags": 4},
+            {"matrix": [1, 0], "x": 0, "y": 16, "flags": 4},
+            {"matrix": [1, 1], "x": 16, "y": 16, "flags": 4},
+            {"matrix": [1, 2], "x": 32, "y": 16, "flags": 4},
+            {"matrix": [1, 3], "x": 48, "y": 16, "flags": 4},
+            {"matrix": [2, 0], "x": 0, "y": 32, "flags": 4},
+            {"matrix": [2, 1], "x": 16, "y": 32, "flags": 4},
+            {"matrix": [2, 2], "x": 32, "y": 32, "flags": 4},
+            {"matrix": [2, 3], "x": 48, "y": 32, "flags": 4}
+        ],
+        "max_brightness": 100,
+        "sleep": true,
+        "timeout": 300000
+    },
+    "url": "https://github.com/drabaioli/SdraKb00",
+    "usb": {
+        "device_version": "1.0.0",
+        "pid": "0x4200",
+        "vid": "0x7331"
+    },
+    "ws2812": {
+        "pin": "B0"
+    },
+    "layouts": {
+        "LAYOUT_ortho_3x4": {
+            "layout": [
+                {"matrix": [0, 0], "x": 0, "y": 0},
+                {"matrix": [0, 1], "x": 1, "y": 0},
+                {"matrix": [0, 2], "x": 2, "y": 0},
+                {"matrix": [0, 3], "x": 3, "y": 0, "encoder": 0},
+                {"matrix": [1, 0], "x": 0, "y": 1},
+                {"matrix": [1, 1], "x": 1, "y": 1},
+                {"matrix": [1, 2], "x": 2, "y": 1},
+                {"matrix": [1, 3], "x": 3, "y": 1},
+                {"matrix": [2, 0], "x": 0, "y": 2},
+                {"matrix": [2, 1], "x": 1, "y": 2},
+                {"matrix": [2, 2], "x": 2, "y": 2},
+                {"matrix": [2, 3], "x": 3, "y": 2}
+            ]
+        }
+    }
+}

keyboards/sdrakbs/sdrakb00/keymaps/default/keymap.c

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+// Copyright 2023 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+/* Keymap for 3x4 Macropad
+ *
+ * Layer 0 (Base Layer) - Numpad layout with mute button and layer toggle:
+ * ,----------------------,
+ * |   7   |   8   |   9   |  MUTE  |
+ * |-------+-------+-------+--------|
+ * |   4   |   5   |   6   | Layer1 |
+ * |-------+-------+-------+--------|
+ * |   1   |   2   |   3   |   0   |
+ * `-----------------------^--------'
+ *
+ * Layer 1 (Function Layer) - Accessed by holding MO(1):
+ * ,----------------------,
+ * | BKSP  |   /   |   -   |  ----  |
+ * |-------+-------+-------+--------|
+ * |   =   |   *   |   +   |  ----  |
+ * |-------+-------+-------+--------|
+ * | ENTER |  ---- |  ---- |   .    |
+ * `-----------------------^--------'
+ *
+ * The base layer (0) provides standard numpad functionality with:
+ * - Numbers 0-9 in traditional numpad layout
+ * - Mute button in top right
+ * - Layer 1 momentary toggle (MO1) in middle right
+ *
+ * The function layer (1) adds:
+ * - Basic mathematical operators (+, -, *, /)
+ * - Backspace, Enter, and decimal point
+ * - Equal sign for calculations
+ * - Empty slots marked as ---- (KC_NO)
+ */
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+    [0] = LAYOUT_ortho_3x4(
+        KC_KP_7,    KC_KP_8,    KC_KP_9,    KC_MUTE,
+        KC_KP_4,    KC_KP_5,    KC_KP_6,    MO(1),
+        KC_KP_1,    KC_KP_2,    KC_KP_3,    KC_KP_0
+    ),
+
+    [1] = LAYOUT_ortho_3x4(
+        KC_BACKSPACE, KC_KP_SLASH,    KC_KP_MINUS, _______,
+        KC_EQUAL,     KC_KP_ASTERISK, KC_KP_PLUS,  _______,
+        KC_ENTER,     _______,          _______,       KC_KP_DOT
+    )
+};
+
+
+/*
+ * Handle layer state changes by updating RGB matrix colors
+ *
+ * Sets RGB matrix colors based on active layer:
+ * - Layer 0: Light green (#88FB7A)
+ * - Layer 1: Red
+ * - Other layers: Red (fallback)
+ */
+layer_state_t layer_state_set_user(layer_state_t state) {
+    switch (get_highest_layer(state)) {
+    case 0:
+        rgb_matrix_sethsv(85, 255, 251); // #88FB7A for layer 0
+        break;
+    case 1:
+        rgb_matrix_sethsv(0, 255, 255); // Red for layer 1
+        break;
+    default:
+        rgb_matrix_sethsv(0, 255, 255); // Red for any other layer
+        break;
+    }
+    return state;
+}

keyboards/sdrakbs/sdrakb00/readme.md

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+# sdrakb00
+
+![sdrakb00](https://i.imgur.com/0HfpFqW.jpeg)
+
+11 keys hot-swap macropad with rotary encoder.
+
+Macropad features:
+- 11 hot-swap keys
+- Rotary encoder with push button
+- AtMega32U4 MCU
+- Per-key RGB led for backlighting
+- USB-C connector
+- On PCB SPI header
+- MCU reset button
+- Switch mounting plate
+- Power LED indicator
+
+* Keyboard Maintainer: [Diego Andres Rabaioli](https://github.com/drabaioli)
+* Hardware Supported: Pro Micro Atmega32u4 based macropad with 11 keys, RGB LED chain and rotary encoder
+* Hardware Availability: [Get the gerbers and have fun building it your self ;)](https://github.com/drabaioli/SdraKb00)
+
+Build SdraKb00 firmware:
+
+    make sdrakbs/sdrakb00:default
+
+Flashing SdraKb00 firmware, execute:
+
+    make sdrakbs/sdrakb00:default:flash
+
+Then press the reset button on the back side of the PCB.
+
+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:
+
+* **Physical reset button** (preferred): Briefly press the button on the back of the PCB
+* **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard
+
+## Default Keymap
+
+### Base Layer (0)
+- NumPad layout (1-9, 0)
+- Encoder: Volume Up/Down
+- Encoder Push: Mute
+- Layer Switch: Hold (1,3) key for function layer
+
+### Function Layer (1)
+- NumPad operators (+, -, *, /)
+- Enter, "=" and backspace keys
+- Decimal point