this is more consistent with other guides

document pseudonyms

Closes #8

See merge request !39

fixes #8

adapt to "move sessions tab out of recruitment settings"

See merge request !40

see castellum!1762

document unlocking locked users

Closes #14

See merge request !43

add note about guardians on subject deletion

Closes #9

See merge request !41

Update study create guide

See merge request !44

Add "home" screenshot to overview

See merge request !46

explain that a study needs to be finished before deletion

See merge request !45

castellum!1563

fixes #9

fixes #14

document external scheduler

See merge request !33

Copyright and Indices

See merge request !38

Guide: mail recruitment

See merge request !34

Refactor subject create

See merge request !37

Align overview with castellum README

See merge request !35

use the word "tab"

See merge request !36

see castellum!1742