doc: add using keyword examples to sqlite

[araujogui]

Add using keyword usage examples to sqlite docs.

Shows how DatabaseSync can be scoped with using so the connection is
closed automatically. Makes Symbol.dispose usage clearer and easier to
discover.

[nodejs-github-bot]

Review requested:

• @nodejs/sqlite

[geeksilva97]

Is there a reason why all the examples should be like that? I wonder if we can have a variety of them.

[araujogui]

Is there a reason why all the examples should be like that? I wonder if we can have a variety of them.

Since this is a new feature, I believe we should introduce it by demonstrating its use and reinforcing best practices to improve the ecosystem

[geeksilva97]

Is there a reason why all the examples should be like that? I wonder if we can have a variety of them.

Since this is a new feature, I believe we should introduce it by demonstrating its use and reinforcing best practices to improve the ecosystem

It's definitely something we want to have in the docs. I don't see a reason for doing that for all examples, though.

[louwers]

I agree that it should not be used in all examples, especially considering:

1. It is not clear what the scope of the database handle is. If it is top-level scope, using will not do anything.
2. It makes it seem like you need explicit resource management. You don't (correct me if I am wrong). The database will be closed when it is garbage collected.

[geeksilva97]

What if we have one example in this section?

[Renegade334]

Worth pointing out that any use of using in the docs will need dont-land labels for pre-v24.x, and will diverge the documentation in the different version branches, which can be problematic for landing future PRs.