Merge branch '49-change-the-source-of-jquery' into 'develop'

feat: added local copy of jquery

See merge request !352

_includes/scripts-head.html

+<script src="{{ '/assets/vendor/js/jquery-3.6.0.min.js' | relative_url }}"></script>

_includes/scripts.html

-<script type="text/javascript" src="https://analytics.lcsb.uni.lu/lap/static/js/jquery.min.js"></script>
 <script type="text/javascript" src="{{ "assets/js/router.js" | relative_url }}"></script>
 <script type="text/javascript" src="{{ "assets/js/box_hider.js" | relative_url }}"></script>
 <script>