New webEOS creation form, information about category, name, etc. and the site lifecycle

Documentation of the new webEOS creation form. Move and update of these Sharepoint pages:

• https://espace.cern.ch/webservices-help/websitemanagement/ManagingWebsitesAtCERN/Pages/WebsitecreationandmanagementatCERN.aspx
• https://espace.cern.ch/webservices-help/websitemanagement/ManagingWebsitesAtCERN/Pages/Namingrules.aspx
• https://espace.cern.ch/webservices-help/GeneralUserInformation/Pages/Websites-Lifecycle-Policy.aspx

Closing https://gitlab.cern.ch/webservices/webservices-portal/-/issues/41