Support remote development/dev container

[OneCyrus]

trafficstars

it would be great if the extension would fully support remote development. e.g. the file browser always shows the local filesystem instead of the remote one when selecting the duckdb file.

[archiewood]

I think if you type a relative remote path into the file picker field, it should work? (Don't click the button, just type)

(Is it just a UI issue, or does it need an underlying fix also)