[Keyboard] Add Binepad KN01 (#25224)

* Add Binepad NeoKnob KN01

* post @waffle87 recommendations

keyboards/binepad/kn01/keyboard.json

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+{
+    "manufacturer": "Binepad",
+    "keyboard_name": "KN01",
+    "maintainer": "Binpad",
+    "bootloader": "stm32duino",
+    "diode_direction": "COL2ROW",
+    "encoder": {
+        "rotary": [
+            {"pin_a": "B3", "pin_b": "B4"}
+        ]
+    },
+    "features": {
+        "bootmagic": true,
+        "encoder": true,
+        "extrakey": true,
+        "mousekey": true
+    },
+    "matrix_pins": {
+        "cols": ["A15"],
+        "rows": ["A8"]
+    },
+    "processor": "STM32F103",
+    "url": "http://binepad.com",
+    "usb": {
+        "device_version": "1.0.0",
+        "pid": "0x4040",
+        "vid": "0x4249"
+    },
+    "community_layouts": ["ortho_1x1"],
+    "layouts": {
+        "LAYOUT_ortho_1x1": {
+            "layout": [
+                {"matrix": [0, 0], "x": 0, "y": 0, "w": 2, "h": 2}
+            ]
+        }
+    }
+}

keyboards/binepad/kn01/keymaps/default/keymap.json

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+{
+    "config": {
+        "features": {
+            "encoder_map": true
+        }
+    },
+    "encoders": [
+        [
+            {
+                "ccw": "KC_VOLD",
+                "cw": "KC_VOLU"
+            }
+        ],
+        [
+            {
+                "ccw": "KC_MS_WH_DOWN",
+                "cw": "KC_MS_WH_UP"
+            }
+        ]
+    ],
+    "keyboard": "binepad/kn01",
+    "keymap": "default",
+    "layers": [
+        ["LT(1, KC_MUTE)"],
+        ["_______"]
+    ],
+    "layout": "LAYOUT_ortho_1x1",
+    "version": 1
+}

keyboards/binepad/kn01/readme.md

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+# BINEPAD NEOKNOB KN01
+
+![Binepad NeoKnob KN01](https://i.imgur.com/N8GXq7P.png)
+
+The KN01 is a multifunction knob, which can be rotated, pressed, and rotated while pressed.
+
+* Keyboard Maintainer: [Binpad](https://github.com/binepad)
+* Hardware Supported: **NEOKNOB KN01**
+* Hardware Availability: [Binepad.com](https://www.binepad.com/products/kn01)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make binepad/kn01:default
+
+Flashing example for this keyboard:
+
+    make binepad/kn01: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 knob while plugging in the keyboard's USB cable
+* **Physical reset button**: Briefly press the button on the underside of the PCB
+* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available