Add Eco keymap, factor Crkbd keymap to community layout, other minor tweaks
* Remove outdated Crkbd Ctrl key positioning info
* Add Left Alt key to Lily58 keymap
* Lily58 no longer overrides default TAPPING_TERM
* Refactor Crkbd keymap to use new community layout
* Fix underglow animations for Crkbd w/ Split Common
* Add initial Eco keymap
* Update outdated reference to Crkbd layout
* Add keymap links to userspace readme
* Add copyright notices to files changed in this PR
This is a place for users to put code that they might use between keyboards. If you build the keymap mine, /users/mine/rules.mk will be included in your build, and /users/mine/ will be in your path - keep these things in mind when naming your files and referencing them from other places.