add new documentation guidelines (#14115)

* add new documentation style-guides

* update CODEOWNERS as well

* try new team

* revert

* Update docs/DOCUMENTATION_GUIDELINES.md

Co-authored-by: Juan <juangirini@gmail.com>

* Update docs/DOCUMENTATION_GUIDELINES.md

Co-authored-by: Juan <juangirini@gmail.com>

* Apply suggestions from code review

Co-authored-by: Ben Greenberg <13892277+hummusonrails@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Sam Johnson <sam@durosoft.com>
Co-authored-by: Ben Greenberg <13892277+hummusonrails@users.noreply.github.com>

* Update docs/DOCUMENTATION_GUIDELINES.md

* Apply suggestions from code review

Co-authored-by: Liam Aharon <liam.aharon@hotmail.com>
Co-authored-by: Ben Greenberg <13892277+hummusonrails@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Ben Greenberg <13892277+hummusonrails@users.noreply.github.com>
Co-authored-by: Liam Aharon <liam.aharon@hotmail.com>

* Apply suggestions from code review

Co-authored-by: Sacha Lansky <sacha@parity.io>
Co-authored-by: Liam Aharon <liam.aharon@hotmail.com>

* Further updates.

* note about rewrap.

* update ToC and more

* update ToC and more

* Update docs/DOCUMENTATION_GUIDELINES.md

Co-authored-by: Sebastian Kunert <skunert49@gmail.com>

* storage

---------

Co-authored-by: Juan <juangirini@gmail.com>
Co-authored-by: Ben Greenberg <13892277+hummusonrails@users.noreply.github.com>
Co-authored-by: Sam Johnson <sam@durosoft.com>
Co-authored-by: Liam Aharon <liam.aharon@hotmail.com>
Co-authored-by: Sacha Lansky <sacha@parity.io>
Co-authored-by: Sebastian Kunert <skunert49@gmail.com>