* Synapse Admin is Ketesa now!

* i18n changes

* add automatic migration

* fix migration version in vars

* add a note about routing for OIDC Auth

* mention v1.0.0 announcement blog post

* Update docs/container-images.md

Co-authored-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Update CHANGELOG.md

Co-authored-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

---------

Co-authored-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/3841

Most of the preparation for this was done by Suguru Hirahara (https://github.com/luixxiul).
I've merely reorganized/polished the scripts and instructions in the `i18n/` directory.

While translations can happen even now, more work is necessary to

- make the translation flow better (integrating Weblate), etc.

- restore the Github Actions workflows that Suguru Hirahara had already developed to
  adapt them to our new workflow