javascript: Add direct TLS negotiation support to Postgres.js sample

[danielfrankcom]

Is your feature request related to a problem? Please describe.
The Postgres.js module currently doesn't support PostgreSQL 17's direct TLS negotiation feature. This feature improves connection performance and compatibility with certain proxies, but our codebase can't take advantage of it without driver support.

Describe the solution you'd like
Once the upstream driver supports the feature, modify the sample to add support for the sslnegotiation connection parameter.

Describe alternatives you've considered

• No alternative available.

Additional context
This feature was originally requested in #150 and has been broken out given many drivers already support this functionality.

Status upstream can be tracked in porsager/postgres#993.

[ldragone]

Hi, i have made a pull request to add support for direct TLS in postgres.js.

porsager/postgres#1104.

PS:
I ran some tests but I don't notice any particular differences in milliseconds needed for the direct connection compared to the standard one.