[Feature] Set WebSocket as default

[stevensJourney]

Overview

This sets the WebSocket connection method to the default option when connecting to a PowerSync instance. Calls to

powersync.connect(connector)

Will now use WebSockets.

HTTP streams can be used (if needed for some reason) by manually specifying the connection method.

powersync.connect(connector, { connectionMethod: SyncStreamConnectionMethod.HTTP });

TODOS:

• [ ] Update any docs where WebSockets/HTTP are mentioned