* Turn off more unnecessary features by default
* Double TAP_CODE_DELAY due to more media key issues
Even with this change, some of the rotary encoder turns on my BDN9's
volume knob still seem to get dropped. It's possible there's something
wrong with the encoder itself. (Maybe the TAP_CODE_DELAY actually causes
QMK to miss an encoder turn? Unclear.) The other knob (backlight
brightness) works fine, FWIW....
* Restructure userspace config.h a bit
* Hack around Instant60 Via EEPROM conflict
Remove this when #6589 is fixed for Via boards.
* Add backlight breathing and (EEPROM) reset to BDN9
* Add keymap for 9-Key macropad
* Switch Quefrency from flaky I2C back to serial
* Lower mouse wheel speed on Quefrency slightly
* Migrate common settings to userspace
* Enable Bootmagic Lite for consistent reset to bootloader.
* Turn off some undesired features across all keyboards.
* Remove EEPROM reset keybinding from all keyboards since Bootmagic Lite
also does an EEPROM reset.
* Set backlight and underglow increments consistently across all
keyboards since lots of them like to override the deafults.
* Set mouse keys consistently across all keyboards.
* Update function layer keymap images
