chore: Add documentation for DB Connection UI (#15599)
chore: Add documentation for DB Connection UI (#15599)

* Create ui.mdx

* more fixxxes

* address comments

* Update ui.mdx

* Update ui.mdx
zhouyao1994/incubator-superset,mistercrunch/panoramix,apache/incubator-superset,airbnb/caravel,airbnb/caravel,mistercrunch/panoramix,apache/incubator-superset,zhouyao1994/incubator-superset,apache/incubator-superset,mistercrunch/panoramix,zhouyao1994/incubator-superset,airbnb/caravel,apache/incubator-superset,apache/incubator-superset,zhouyao1994/incubator-superset,zhouyao1994/incubator-superset,mistercrunch/panoramix,airbnb/caravel