Update docs for coco GA release

[a-mccarthy]

No description provided.

[github-actions]

Documentation preview

https://nvidia.github.io/cloud-native-docs/review/pr-365

[fitzthum]

A few comments on the attestation stuff.

[Copilot]

Pull request overview

Updates the documentation set to reflect the Confidential Containers (CoCo) GA / Reference Architecture release, including new pages and updated navigation/redirects to surface the new content.

Changes:

• Updated GPU Operator docs navigation and redirects to point to new Confidential Containers deployment content.
• Added new Confidential Containers documentation pages (deploy guide, attestation, licensing, supported platforms).
• Refreshed the Confidential Containers overview content to remove Early Access framing and expand details.

Reviewed changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 13 comments.

Show a summary per file

File	Description
repo.toml	Updates redirect rules related to Confidential Containers pages.
gpu-operator/index.rst	Adds a nav entry to the new GPU Operator Confidential Containers page.
gpu-operator/getting-started.rst	Minor formatting-only adjustment in a table row.
gpu-operator/confidential-containers-deploy.rst	New GPU Operator page linking out to the Confidential Containers RA docs.
confidential-containers/index.rst	Updates Confidential Containers landing page nav and cards for GA structure.
confidential-containers/overview.rst	Reworks overview content to GA/RA framing and expands sections.
confidential-containers/supported-platforms.rst	New supported platforms and component versions page.
confidential-containers/confidential-containers-deploy.rst	New end-to-end deployment guide for CoCo with GPU Operator + Kata.
confidential-containers/attestation.rst	New attestation configuration page (Trustee + NVIDIA verifier).
confidential-containers/licensing.rst	New licensing info page for NVIDIA Confidential Computing capability.

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