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/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);