Add lyn TODO: add vial support

keyboards/lyn/config.h

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+// Copyright 2023 paatchii (@paatchii)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+/*
+ * Feature disable options
+ *  These options are also useful to firmware size reduction.
+ */
+
+/* disable debug print */
+//#define NO_DEBUG
+
+/* disable print */
+//#define NO_PRINT
+
+/* disable action features */
+#define NO_ACTION_LAYER
+#define NO_ACTION_TAPPING
+#define NO_ACTION_ONESHOT
+
+#define EE_HANDS
+
+#define SPLIT_USB_DETECT

keyboards/lyn/info.json

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+{
+    "manufacturer": "paatchii",
+    "keyboard_name": "lyn",
+    "maintainer": "paatchii",
+    "bootloader": "atmel-dfu",
+    "features": {
+        "bootmagic": true,
+        "command": false,
+        "console": false,
+        "extrakey": false,
+        "mousekey": false,
+        "nkro": true
+    },
+    "matrix_pins": {
+        "direct": [
+            [ null, null, "F4", "F1", null],
+            [ "F7", "F6", "F5", "F0", "D2"]
+        ]
+    },
+    "encoder": {
+        "enabled": true,
+        "rotary": [
+            {"pin_a": "D6", "pin_b": "D7"}
+        ]
+    },
+    "split": {
+        "enabled": true,
+        "soft_serial_pin": "D0",
+        "matrix_pins": {
+            "right": {
+                "direct": [
+                    [null, "F0", "B0", null, null],
+                    ["D5", "F1", "B1", "B2", "B3"]
+                ]
+            }
+        },
+        "encoder": {
+            "right": {
+                "rotary": [
+                    {"pin_a": "D7", "pin_b": "D6"}
+                ]
+            }
+        }
+    },
+    "processor": "atmega32u4",
+    "usb": {
+        "device_version": "1.0.0",
+        "pid": "0x776C",
+        "vid": "0xADA6"
+    },
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+                {"matrix": [0, 2], "x": 2, "y": 0},
+                {"matrix": [0, 3], "x": 3, "y": 0},
+
+                {"matrix": [2, 1], "x": 7, "y": 0},
+                {"matrix": [2, 2], "x": 8, "y": 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": [1, 4], "x": 4, "y": 1},
+
+                {"matrix": [3, 0], "x": 6, "y": 1},
+                {"matrix": [3, 1], "x": 7, "y": 1},
+                {"matrix": [3, 2], "x": 8, "y": 1},
+                {"matrix": [3, 3], "x": 9, "y": 1},
+                {"matrix": [3, 4], "x": 10, "y": 1}
+            ]
+        }
+    },
+    "rgblight": {
+        "led_count": 6,
+        "split": true,
+        "split_count": [3, 3],
+        "max_brightness": 128,
+        "animations": {
+            "rainbow_swirl": true,
+            "rainbow_mood": true
+        }
+    },
+    "ws2812": {
+        "pin": "D3"
+    },
+    "build": {
+        "lto": true
+    }
+}

keyboards/lyn/keymaps/default/keymap.c

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+#include QMK_KEYBOARD_H
+
+enum layers {
+    _OSU = 0,
+    _ADJ
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [_OSU] = LAYOUT(
+                   RGB_TOG, KC_NO,             RGB_MOD, RGB_RMOD,
+       KC_A, KC_S, KC_D, KC_F, KC_BSPC, KC_SPC, KC_J, KC_K, KC_L, KC_SCLN
+    )
+};

keyboards/lyn/readme.md

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+# lyn
+
+![lyn](imgur.com image replace me!)
+
+*A short description of the keyboard/project*
+
+* Keyboard Maintainer: [paatchii](https://github.com/paatchii)
+* Hardware Supported: *The PCBs, controllers supported*
+* Hardware Availability: *Links to where you can find this hardware*
+
+Make example for this keyboard (after setting up your build environment):
+
+    make lyn:default
+
+Flashing example for this keyboard:
+
+    make lyn: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 key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard
+* **Physical reset button**: Briefly press the button on the back of the PCB - some may have pads you must short instead
+* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available

keyboards/lyn/rules.mk

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+# This file intentionally left blank
+RGBLIGHT_ENABLE = yes