[Keyboard] Doro67 cleanup (#6514)

[Keyboard] Doro67 cleanup (#6514)

Add spacing to LAYOUT macros, add layout comments, improve consistency, fix ISO layout bug

* Remove placeholder comments in regular.h and rgb.h

* Change K## to k## in multi.h and regular.h

* Add alignment whitespace in Doro67 LAYOUT macros

* Update multi default keymaps and add layout comments

* Update rgb default keymap and add layout comments

* Add RESET to Fn layer in multi default keymaps

* Replace KC_GESC with KC_ESC in rgb default keymap for consistency with other Doro keymaps

* Update regular default keymap and add layout comments

* WIP

* Replace odd F1, F2 with proper split LShift/Backspace keys in default_multi

* Minor fixes and tweaks in multi default keymaps

* Fix Enter and NUHS positions in multi LAYOUT_iso

* Return true in process_record_user in rgb default keymap

* Update Enter position in multi info.json

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>
* Update labels in multi info.json to match the default keymaps