[Keymap] New Planck 2x2U keymap (#5519)

[Keymap] New Planck 2x2U keymap (#5519)

* Initial keymapping

* Removed unneccessary config files

* Update readme.md

* Updated symbol locations, tap dance on parentheses for brackets.

* Update readme.md

* Fixed layout image inconsistencies

* More quality shift key layer control, swapped enter + shift enter

* Keyap tweaks and config cleanup

* Almost compiling, still has layout reference issues.

* Finally compiling. 2x2u layout (default, not mine) had nonexistent keys on it

* Super minor changes

* Ctrl+Bksp after first tap

* Changed bind so un/lock is explicit to work with remote un/locking

* Added keyboard passwords please don't hate me

* Changed backspace functionality and added em dash

* Changed to send_string because it's preferred for macros

* Minor fixes

* Removed global redefinition and fixed possible issue between 6KRO and NKRO

* Cleanup

* Layer names, password layer is OSL over toggle

* Hopefully now in QMK preferred format.

* Blank passwords.c

I realized with me excluding this it wouldn't compile - so adding a blank one.

* Fixed OSLs not cancelling after tapping term

* Matrix change.

KC_NO instead of repeating.

* Unneeded line.

Co-Authored-By: IsaacElenbaas <34344969+IsaacElenbaas@users.noreply.github.com>
* Fixed return statements to work with after-press functions

* External image host

* Removed image from github

* Removed unneccessary rules.mk lines and fixed tabbing

* Typos

* Fixes upon part arrival.

* Final changes and bug fixes

* Preventing KC_NO from waking monitors.

* Fix to rest of matrices

In response to https://github.com/evillemez/qmk_firmware/issues/1—the rest have the same problem.
The switch of k37 for k36 is just for consistency between that and the 2x2u.

* Workaround for #6214, minor changes, CRLF change in passwords because it won't leave my modified no matter what I do.