Issue on docs: embedded replicas rust example

[qtfkwk]

Path: /features/embedded-replicas/introduction

https://docs.turso.tech/features/embedded-replicas/introduction#usage

Hi! Having some confusion with the documentation...

The Rust example has:

use libsql::{Builder};

let build = Builder::new_remote_replica("file:replica.db", "libsql://...", "...")
   .build()
   .await?;
let client = build.connect()?;

client.sync().await?;

Feedback:

1. Change use libsql::{Builder}; to use libsql::Builder;

2. client is a Connection. Connection doesn't have any sync method, but Database does... and build is a Database... so perhaps it should be build.sync().await?;?

3. In general, it would be useful if the examples in the documentation used better, descriptive, and consistent variable names to improve understanding. For example, the prior snippet uses db and conn, which make more sense honestly than build and client. Why are they different here? If there's a good reason, the doc should explain it. If not, they should match the same names used everywhere else.