refactor(behaviors): Add max-held tap-dance config
Add new `CONFIG_ZMK_BEHAVIOR_TAP_DANCE_MAX_HELD` config for reducing RAM
usage on more constrained devices.
refactor(behaviors): Move defaults to Kconfig.defaults
docs: Fix incorrect kconfig default values
fix(Kconfig): Added a name to EC11's trigger mode choice, allowing it to be set in device Kconfig.defconfig
refactor(Kconfig): Moved designer defaults out into new files