better documentation of template dirs

[nerdoc]

In e.g. the template docs for consent, there are the "template dirs" mentioned , but it is not said (from a newcomer perspective) where these template dirs are - the template docs tell me where to put them IMHO.

Given this yaml block...

user_consent:
  template_dir: privacy_policy_templates

...I would think that there must be a "privacy_policy_templates" directory within the custom user templates directory, with my config:

templates:
  custom_template_directory: "/home/myuser/synapse/templates/"

I have /home/myuser/synapse/templates/ and a /home/myuser/synapse/templates/privacy_policy_templates directories, and in the latter an en directory with a 1.0.html file.
But they are not found.

I think there is a misconfiguration, but the docs here are not clear IMHO.

[nerdoc]

One hint:

user_consent:
  template_dir: /absolute/path/to/privacy_policy_templates/

Then it works. I don't know if relative paths, in some way, work too. But this should be stated clearly.