[Keyboard] Z-150 Blackheart refactor (#5823)

* Fix white space on z150_blackheart.h

* Update z150_blackheart.h to use #pragma once include guard

* Update z150_blackheart.h to use QMK-preferred K<row><col> notation

* Add QMK Configurator support

* Refactor the keymaps

- refactor the keymaps into separate files for each layout macro
- give credit where credit is due
- white space update (four-space indent)

* Make Hardware Availability link in readme a rich text link

* Convert LED indicators to GPIO commands

* Elevate Indicator LED set-up and toggling to keyboard level

keyboards/z150_blackheart/z150_blackheart.c

@@ -1 +1,32 @@
 #include "z150_blackheart.h"
+
+void matrix_init_kb(void) {
+    setPinOutput(B0);
+    setPinOutput(E6);
+    setPinOutput(E7);
+
+    matrix_init_user();
+};
+
+void led_set_kb(uint8_t usb_led) {
+    // put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
+    if (IS_LED_ON(usb_led, USB_LED_NUM_LOCK)) {
+        writePinHigh(E7);
+    } else {
+        writePinLow(E7);
+    }
+
+    if (IS_LED_ON(usb_led, USB_LED_CAPS_LOCK)) {
+        writePinHigh(B0);
+    } else {
+        writePinLow(B0);
+    }
+
+    if (IS_LED_ON(usb_led, USB_LED_SCROLL_LOCK)) {
+        writePinHigh(E6);
+    } else {
+        writePinLow(E6);
+    }
+
+    led_set_user(usb_led);
+}