Add GLM as a native model provider

[webup]

What

Add GLM as a first-class native provider in the setup wizard and Models module.

Why

Users should be able to configure GLM directly instead of relying on the custom OpenAI-compatible provider path.

How

Add a provider catalog entry with defaults, models, labels, and tests so both the onboarding wizard and Models page expose GLM consistently.

[webup]

I plan to add GLM as a native text provider by extending the shared setup provider catalog, ensuring the onboarding wizard and Models page both surface it with default Base URL/model choices, and adding focused tests for the catalog and UI coverage.

[webup]

Follow-up: I am adding contributor-facing provider integration guidance to CONTRIBUTING.md so external providers can see the expected OpenClaw support, ClawMaster catalog/UI touchpoints, backend allowlist updates, and test requirements before opening integration PRs.

[webup]

Closed by #104, which added GLM/Z.AI as a native provider in the setup wizard and Models module, wired live catalog support for desktop and web runtimes, added focused tests, and documented the provider integration workflow in CONTRIBUTING.md.