Tandem checkin for ploopyco overhaul

- Added build option for new ploopy nano build
- Added ploopy nano userspace keymap
- Removed old drag scroll detection. OLED graphic tied to scroll lock
- REmoved old scroll lock and dpi custom keycodes used for Lkbm keymap
- overrode num/scroll lock. It is now a hold instead of a toggle
- Added custom keycode to turn on all locks to tell ploopy nano to
enter bootloader
- refactored variables based on learnings from ploopy rebase
- minor tweaks to keymap
- pressing numlock cycles through dpi settings
- pressing scroll lock enters momentary drag scroll

users/t4corun/features/combo.c

@@ -36,7 +36,7 @@ bool combo_should_trigger(uint16_t combo_index, combo_t *combo, uint16_t keycode
 //  case MOUSE_BUTTON5:
 
     case MOUSE_DRGTOG:
-      if ( get_highest_layer(layer_state | default_layer_state) > _DEFAULT_LAYER_1 ) return false;
+      if ( get_highest_layer(layer_state | default_layer_state) > FIRST_DEFAULT_LAYER ) return false;
 
     default:
       return true;

users/t4corun/features/oled.c

@@ -115,7 +115,7 @@ void render_feature_status(bool vertical) {
 #endif //RGB_MATRIX_ENABLED
 
   // only works on master side
-  drag_scroll_is_enabled() ? oled_write_P(dragscr_on, false) : oled_write_P(dragscr_off, false);
+  host_keyboard_led_state().scroll_lock ? oled_write_P(dragscr_on, false) : oled_write_P(dragscr_off, false);
 
   if (vertical) {
     oled_write_P(PSTR(" "), false);

users/t4corun/features/taphold.h

@@ -1,6 +1,11 @@
 #pragma once
 #include "t4corun.h"
 
+// Tells the process_tap_hold_key what kind of hold action is wanted
+#define HOLD_SINGLETP 0
+#define HOLD_DOUBLETP 1
+#define HOLD_BRACKETS 2
+
 void single_tap(uint16_t key);
 void double_tap(uint16_t key, uint32_t ms);
 void insert_brackets(uint16_t left, uint16_t right, uint32_t ms);