* add RGBRST key into helix/pico:default keymap ADJUST layer
* update helix/rev2:default keymap's OLED display contents
* add RGBRST key to HELIX_ROWS == 4 ADJUST layer
* add CAPS key to RAISE, LOWER layer
* add layer status display on slave side oled
* add RGB LED status display on both side oled
* save stack memory size