More valid docs

[greg0ire]

phpdocumentor/guides v0.3.4 was published. It helps spot more issues in our documentation.

The remaining issues are reduced to this list:

[2024-02-17T14:13:22.125246+00:00] app.WARNING: No template found for rendering directive "toc". Expected template "body/directive/toc.html.twig" [] []
[2024-02-17T14:13:22.126710+00:00] app.WARNING: No template found for rendering directive "tocheader". Expected template "body/directive/tocheader.html.twig" [] []
[2024-02-17T14:13:22.130911+00:00] app.WARNING: No template found for rendering directive "toc". Expected template "body/directive/toc.html.twig" [] []
[2024-02-17T14:13:22.130978+00:00] app.WARNING: No template found for rendering directive "tocheader". Expected template "body/directive/tocheader.html.twig" [] []
[2024-02-17T14:13:22.153960+00:00] app.WARNING: No template found for rendering directive "toc". Expected template "body/directive/toc.html.twig" [] []
[2024-02-17T14:13:22.154028+00:00] app.WARNING: No template found for rendering directive "tocheader". Expected template "body/directive/tocheader.html.twig" [] []