feat: describe the Community Edition (embedded) UI component (database-lab#302)

Description

• generally describe the Community Edition (embedded) UI component
• describe the Community Edition (embedded) UI component in case of Terraform usage
• add the Community Edition (embedded) UI configuration reference
• fix description of DLE containers and its label

Related issue

database-lab#302 (closed)

Examples

Checklist

• the MR description has been reviewed
• this MR contains text changes and they have been reviewed OR there are no texts changes
• this MR contains GUI/CLI changes and they have been reviewed OR there are no GUI/CLI changes
• this MR contains API changes and they have been reviewed OR there are no API changes