Use `libsql-server` instead of `sqld` for `turso dev`

[CodingDoug]

The name of the binary is changing: libsql/sqld#694

[CodingDoug]

In order to transition more cleanly, the CLI might want to try libsql-server first, then sqld. If sqld is found, continue with a clear deprecation notice.

[notrab]

Closing this since turso dev will include this by default.