Getting started guide expanded

The Quickstart is now a complete on-ramp: how to create your first key, where to point your SDK’s base URL, and copy-paste examples for cURL, Python, Node.js and Go — including streaming.

A model id reference table lists every catalog id with its context window, so you can wire up model switchers without guesswork.

For the moments when things don’t work, a new errors table maps every status code to a cause and a fix. More guides — tool calling, structured output, agents — are coming.