[DuckDB] Add community extension gsheet

[royendo]

Is your feature request related to a problem? Please describe.
While we have on our docs that we support Google sheets, this requires the user to make the dataset public which is not desirable.

Describe the solution you'd like
DuckDB community extension gsheet allows you to create a token via google console and share the sheet to the secret and access it via the read_gsheet function. Then we can also add the as an officially supported connector and add it to the UI.

Describe alternatives you've considered
I've tried to share the sheet to BQ and import that into Rill but haven't had any luck with successfully doing so.
One option is to do the above the copy the BQ external table to a BQ table and it works, but auto updating wont work.

Additional context
Several customers have requested this.