Add notes about Dimension being unmaintained

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2806

docs/configuring-playbook-dimension.md

@@ -3,6 +3,8 @@
 **[Dimension](https://dimension.t2bot.io) can only be installed after Matrix services are installed and running.**
 If you're just installing Matrix services for the first time, please continue with the [Configuration](configuring-playbook.md) / [Installation](installing.md) flow and come back here later.
 
+**Note**: Dimension is **[officially unmaintained](https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2806#issuecomment-1673559299)**. We recommend not bothering with installing it.
+
 **Note**: This playbook now supports running [Dimension](https://dimension.t2bot.io) in both a federated and [unfederated](https://github.com/turt2live/matrix-dimension/blob/master/docs/unfederated.md) environments. This is handled automatically based on the value of `matrix_synapse_federation_enabled`. Enabling Dimension, means that the `openid` API endpoints will be exposed on the Matrix Federation port (usually `8448`), even if [federation](configuring-playbook-federation.md) is disabled. It's something to be aware of, especially in terms of firewall whitelisting (make sure port `8448` is accessible).
 
 

docs/configuring-playbook.md

@@ -30,7 +30,7 @@ When you're done with all the configuration you'd like to do, continue with [Ins
 
 ### Additional useful services
 
-- [Setting up the Dimension Integration Manager](configuring-playbook-dimension.md) (optional, but recommended; after [installing](installing.md))
+- [Setting up the Dimension Integration Manager](configuring-playbook-dimension.md) (optional; [unmaintained](https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2806#issuecomment-1673559299); after [installing](installing.md))
 
 - [Setting up the Jitsi video-conferencing platform](configuring-playbook-jitsi.md) (optional)