Documentations: Add docs for settings.

See merge request !851

* upstream/develop: (374 commits)
  fix typo
  rename mutations according to actual property names
  fix
  fix
  fix logged out post-update
  fix user banner
  fix
  AMERICA
  comments
  No longer sending extra data, renamed some properties
  Revert "add TOTP/Recovery Form for mobile version"
  Apply suggestion to src/services/entity_normalizer/entity_normalizer.service.js
  i18n/Update Japanese translation
  render modal at the root level using portal
  install portal vue
  Small improve of the who to follow panel layout
  Fix/Small fix in the who to follow page
  remove console spam
  i18n
  wire up user.description with masto api data
  ...

Proper clientId/secret/token caching, MastoAPI registration

Closes #554

See merge request !806

Fix broken token authentication

See merge request !831

* upstream/develop:
  fix user banner

fix user banner

See merge request !828