* Add nordic keymap
Changes from default:
- Change button right of `LSHIFT` to `KC_NUBS`
- Add some more keys to the second layer.
* Add sleepmode functionality
Added a sleepmode, this turns of the rgb_matrix if no key was pressed for x minutes. Not default on, so you have to enable it by defining `SLEEPMODE_ENABLED`.
* Move all sleepmode config to config.h, rename keymap
- Move all configurations for sleepmode to keymap config.h
- rename keymap to include reference to it having sleepmode (suggestion from guy the discord-server)
- add copyright in config.h
* Update keyboards/bm60rgb_iso/keymaps/iso_nordic_sleepmode/config.h
* Update keyboards/bm60rgb_iso/keymaps/iso_nordic_sleepmode/keymap.c
* Update keyboards/bm60rgb_iso/keymaps/iso_nordic_sleepmode/keymap.c
* Update keyboards/bm60rgb_iso/keymaps/iso_nordic_sleepmode/keymap.c
* Update keyboards/bm60rgb_iso/keymaps/iso_nordic_sleepmode/keymap.c
* Update keyboards/bm60rgb_iso/keymaps/iso_nordic_sleepmode/keymap.c
