[Keyboard] Add skmt/15k keyboard (#18321)

Co-authored-by: Joel Challis <git@zvecr.com>

keyboards/skmt/15k/config.h

@@ -0,0 +1,79 @@
+// Copyright 2022 Jimmy Lye (@satorusaka)
+// 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 FORCE_NKRO
+
+#define RGB_DI_PIN GP1 // RGB LED pin
+#define RGBLED_NUM 15 // Number of LEDs
+#define DRIVER_LED_TOTAL 15 // Number of LEDs
+#define RGB_DISABLE_WHEN_USB_SUSPENDED
+#define RGB_MATRIX_MAXIMUM_BRIGHTNESS 255
+#define RGB_MATRIX_LED_FLUSH_LIMIT 16
+#define RGB_MATRIX_KEYPRESSES
+
+// RGB Matrix Animation modes. Explicitly enabled
+// For full list of effects, see:
+// https://docs.qmk.fm/#/feature_rgb_matrix?id=rgb-matrix-effects
+#    define ENABLE_RGB_MATRIX_ALPHAS_MODS
+#    define ENABLE_RGB_MATRIX_GRADIENT_UP_DOWN
+#    define ENABLE_RGB_MATRIX_GRADIENT_LEFT_RIGHT
+#    define ENABLE_RGB_MATRIX_BREATHING
+#    define ENABLE_RGB_MATRIX_BAND_SAT
+#    define ENABLE_RGB_MATRIX_BAND_VAL
+#    define ENABLE_RGB_MATRIX_BAND_PINWHEEL_SAT
+#    define ENABLE_RGB_MATRIX_BAND_PINWHEEL_VAL
+#    define ENABLE_RGB_MATRIX_BAND_SPIRAL_SAT
+#    define ENABLE_RGB_MATRIX_BAND_SPIRAL_VAL
+#    define ENABLE_RGB_MATRIX_CYCLE_ALL
+#    define ENABLE_RGB_MATRIX_CYCLE_LEFT_RIGHT
+#    define ENABLE_RGB_MATRIX_CYCLE_UP_DOWN
+#    define ENABLE_RGB_MATRIX_RAINBOW_MOVING_CHEVRON
+#    define ENABLE_RGB_MATRIX_CYCLE_OUT_IN
+#    define ENABLE_RGB_MATRIX_CYCLE_OUT_IN_DUAL
+#    define ENABLE_RGB_MATRIX_CYCLE_PINWHEEL
+#    define ENABLE_RGB_MATRIX_CYCLE_SPIRAL
+#    define ENABLE_RGB_MATRIX_DUAL_BEACON
+#    define ENABLE_RGB_MATRIX_RAINBOW_BEACON
+#    define ENABLE_RGB_MATRIX_RAINBOW_PINWHEELS
+#    define ENABLE_RGB_MATRIX_RAINDROPS
+#    define ENABLE_RGB_MATRIX_JELLYBEAN_RAINDROPS
+#    define ENABLE_RGB_MATRIX_HUE_BREATHING
+#    define ENABLE_RGB_MATRIX_HUE_PENDULUM
+#    define ENABLE_RGB_MATRIX_HUE_WAVE
+#    define ENABLE_RGB_MATRIX_PIXEL_RAIN
+#    define ENABLE_RGB_MATRIX_PIXEL_FLOW
+#    define ENABLE_RGB_MATRIX_PIXEL_FRACTAL
+// enabled only if RGB_MATRIX_FRAMEBUFFER_EFFECTS is defined
+#    define ENABLE_RGB_MATRIX_TYPING_HEATMAP
+#    define ENABLE_RGB_MATRIX_DIGITAL_RAIN
+// enabled only of RGB_MATRIX_KEYPRESSES or RGB_MATRIX_KEYRELEASES is defined
+#    define ENABLE_RGB_MATRIX_SOLID_REACTIVE_SIMPLE
+#    define ENABLE_RGB_MATRIX_SOLID_REACTIVE
+#    define ENABLE_RGB_MATRIX_SOLID_REACTIVE_WIDE
+#    define ENABLE_RGB_MATRIX_SOLID_REACTIVE_MULTIWIDE
+#    define ENABLE_RGB_MATRIX_SOLID_REACTIVE_CROSS
+#    define ENABLE_RGB_MATRIX_SOLID_REACTIVE_MULTICROSS
+#    define ENABLE_RGB_MATRIX_SOLID_REACTIVE_NEXUS
+#    define ENABLE_RGB_MATRIX_SOLID_REACTIVE_MULTINEXUS
+#    define ENABLE_RGB_MATRIX_SPLASH
+#    define ENABLE_RGB_MATRIX_MULTISPLASH
+#    define ENABLE_RGB_MATRIX_SOLID_SPLASH
+#    define ENABLE_RGB_MATRIX_SOLID_MULTISPLASH