Update KfW Geodata Model Guidelines (#20)

* Create How-To_for_KfW_staff

This serves as primary orientation for KfW staff on how to request Project Location Data Collection with minimum effort.

* Update and rename How-To_for_KfW_staff to howto_for_kfw_staff.md

* Update mkdocs.yml

* Delete docs/howto_for_kfw_staff.md

* Update index.md

from our first session

* Update index.md

add some more information

* Update index.md

further refinement

* Update index.md

structure doc

* Update mkdocs.yml

* Update mkdocs.yml

* Update mkdocs.yml

* Update mkdocs.yml

* Update docs/index.md

Co-authored-by: fretchen <fred.jendrzejewski@gmail.com>

* Update docs/index.md

Co-authored-by: fretchen <fred.jendrzejewski@gmail.com>

* Update docs/index.md

Co-authored-by: fretchen <fred.jendrzejewski@gmail.com>

* Update docs/index.md

Co-authored-by: fretchen <fred.jendrzejewski@gmail.com>

* Update docs/index.md

Co-authored-by: fretchen <fred.jendrzejewski@gmail.com>

* Update docs/index.md

Co-authored-by: fretchen <fred.jendrzejewski@gmail.com>

* Update docs/index.md

Co-authored-by: fretchen <fred.jendrzejewski@gmail.com>

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Co-authored-by: Surafel <91615452+S-r-f-l@users.noreply.github.com>
Co-authored-by: Johannes Schielein <johannes.schielein@posteo.net>
Co-authored-by: fretchen <fred.jendrzejewski@gmail.com>