[9.0] [DOCS][9.x] Improve ESQL reference docs information architecture (#127248)#127380

leemthompo merged 1 commit intoelastic:9.0elastic/elasticsearch:9.0from

leemthompo:backport/9.0/pr-127248leemthompo/elasticsearch:backport/9.0/pr-127248Copy head branch name to clipboard