This is actually authored by Julian Foad here
(https://lab.trax.im/matrix/matrix-docker-ansible-deploy), but was in
need of a rebase and various adjustments caused by huge playbook
refactoring that landed in the past months.

This rework is completely untested.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/266

* Draupnir for all Role

* Draupnir for all Documentation

* Pin D4A to Develop until D4A patches are in a release.

* Update D4A Docs to mention pros and cons of D4A mode compared to normal

* Change Documentation to mention a fixed simpler provisioning flow.

Use of /plain allows us to bypass the bugs encountered during the development of this role with clients attempting to escape our wildcards causing the grief that led to using curl.

This reworded commit does still explain you can automatically inject stuff into the room if you wanted to.

* Emphasise the State of D4A mode

* Link to Draupnir-for-all docs and tweak the docs some

* Link to Draupnir-for-all from Draupnir documentation page

* Announce Draupnir-for-all

---------

Co-authored-by: Slavi Pantaleev <slavi@devture.com>

This also adds labels for Synapse. Support for other homeservers and
components will be added later.

This also updates validation tasks and documentation, pointing to
variables in the matrix-synapse role which don't currently exist yet
(e.g. `matrix_synapse_container_labels_client_synapse_admin_api_enabled`).

These variables will be added soon, as Traefik labels are added to the
`matrix-synapse` role. At that point, the `matrix-synapse-reverse-proxy-companion` role
will be updated to also use them.

Rate limit docs had a issue due to the wrong request type by accident. This was not noticed due to both bots can work with rate limits. Synapse Admin links where also bugged but now fixed.

Draupnir moved its repo on github from the namespace of its maintainer Gnuxie to a newly created Github Organisation the-draupnir-project and this commit reflects this.

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/2451