Edit content on help page
Content on new help page was taken from the old search as-is and does not apply to the new search.
Update the content with helpful and correct content.
New rules/tips can be extracted from the help syntax and the user docs: https://cern-search.docs.cern.ch/usage/operations/#advanced-queries.
Inspiration can be also taken from https://inveniordm.web.cern.ch/help/search which has the same syntax as us.
Tasks:
- Test and study the queries and prepare a codimd with suggested new help tips: Estimate: 1 day
- Change UI not to use cards in the help page + Add the new content: Estimate: 1 day