Improve consistency with other JS libraries

[kearfy]

This PR:

• Is replacing ns/db/sc/user/pass with namespace/database/scope/username/password where this was not already the case
• Ensures the authentication token to be returned when authenticating as a root user
• Ensures true being returned when authenticating with a token successfully
• Ensuring that the query/select/create/update/merge/patch/delete methods always return an array (to stay consistent with other JS SDKs)
• Fixes some of the tests
• Improved typescript typing

[rushmorem]

The Wasm library returns a unit, like the previous implementation. By returning a boolean here, I presume when the function runs successfully it will always return true but never false, right?

[kearfy]

Yes, it will return true or it will throw an error :)

[kearfy]

The issue with returning void, well... undefined, is that you cannot nicely check if the authentication succeeded. Now you can:

if (await db.authenticate('...')) {
    // ...
}

Or you can catch the error and change the response based on that

const success = await db.authenticate('...')
    .catch((error) => false);
  
if (success) {
    // ...
} else {
    // ...
}

[rushmorem]

I see. In Rust we typically avoid using booleans in cases like that, preferring a unit instead, because a boolean gives an impression that you will need to account for a false response too. Which is never the case here.

[kearfy]

Right! We could have done that, but I don't think it's a biggie here. Typescript is not as strict as Rust (the type of _true is explicitly true here, but there are no errors or warnings about the else clause)

[rushmorem]

It's not about compiler errors or warnings. In Rust you won't get those either when using an if statement. You would have to use match for that. The issue was the impression it gives fellow developers when looking at the return type or when looking code examples. They may feel that they need to write an else branch to be extra careful but that else branch is unnecessary and never triggered.

[RaphaelDarley]

Looks good, particularly improved tests, and ts typing.