use css transitions instead of js for project description

[nworr]

commit cherry-picked from #4032

see behavior in https://jsfiddle.net/nworr/xqet7ohm/24/

Funded by 3Liz

[Gustry]

@nworr I might get wrong, but this PR seems linked to new failing test on cypress

https://github.com/3liz/lizmap-web-client/actions/runs/7641473251 on this branch and now on master

  2 failing

  1) Projects homepage
       should display project metadata (cold cache):
     AssertionError: Timed out retrying after 4000ms: Expected to find element: `.liz-project-desc`, but never found it. Queried from element: <div.liz-project>
      at Context.eval (http://localhost:8130/__cypress/tests?p=cypress/integration/projects_homepage-ghaction.js:104:93)

  2) Projects homepage
       should display project metadata  (hot cache):
     AssertionError: Timed out retrying after 4000ms: Expected to find element: `.liz-project-desc`, but never found it. Queried from element: <div.liz-project>
      at Context.eval (http://localhost:8130/__cypress/tests?p=cypress/integration/projects_homepage-ghaction.js:129:93)

[nworr]

i agree, the PR change the liz-project-desc position in DOM, quick fix can be done, perhaps using playwright, i'm on it