Select: Differentiate textual and HTML content

[mfranzke]

Currently we're outputting textual content within the DBSelect element directly inline into that elements HTML due to that following code:

core-web/packages/components/src/components/select/select.lite.tsx

Line 251 in 0281fc9

{props.children}

This one is most likely meant to handle composition (included option HTML elements). So we would somehow either need to differentiate the contents by their type, or provide a specific property to get those textual contents (description).