add 'none' as an option for reasoning effort, update models across

[peterj]

fixes #2226 by adding 'none' to the reasoning effort and updates the model list.

[Copilot]

Pull request overview

This PR addresses issue #2226 by allowing reasoningEffort: none in ModelConfig (enabling OpenAI Chat Completions tool-calling for models that require disabling reasoning) and refreshes the backend “supported models” list exposed to the UI/API.

Changes:

• Add "none" as a valid reasoningEffort value in the ModelConfig CRD schema (Go types + generated CRDs + Helm CRDs).
• Update internal supported model lists across multiple providers (notably adding gpt-5.6-* models).
• Update architecture docs to reflect the new reasoningEffort option.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
helm/kagent-crds/templates/kagent.dev_modelconfigs.yaml	Adds none to the CRD enum for reasoningEffort in the Helm-distributed CRDs.
go/core/internal/httpserver/handlers/models.go	Expands/refreshes the supported model lists returned by the models API endpoint.
go/api/v1alpha2/modelconfig_types.go	Extends kubebuilder enum to include none and documents why it’s needed for certain OpenAI models.
go/api/config/crd/bases/kagent.dev_modelconfigs.yaml	Adds none to the generated CRD base schema enum for reasoningEffort.
docs/architecture/crds-and-types.md	Documents reasoningEffort: none in the CRD/type overview.

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