docs(openid-connect): re-port with Admin API, ADC, and Ingress Controller tabs

[Yilialinn]

Re-ports the openid-connect plugin documentation with Admin API, ADC, and Ingress Controller tab structure, updated attribute table, canonical link, and breaking change note for ssl_verify default value change in APISIX 3.16.0.

[Copilot]

Pull request overview

This PR re-ports the openid-connect plugin documentation to the newer documentation structure (Admin API / ADC / Ingress Controller tabs), refreshes the attribute tables, and documents the ssl_verify default change as a breaking change (APISIX 3.16.0).

Changes:

• Adds Docusaurus tabbed examples for Admin API, ADC, and Ingress Controller configurations.
• Reworks and expands the attribute tables, including updated encrypt_fields notes and environment variable examples.
• Updates/expands troubleshooting content and adds a “User Info” section (EN/ZH).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 8 comments.

File	Description
docs/zh/latest/plugins/openid-connect.md	Reworked ZH plugin doc structure, attributes table, and examples with tabs.
docs/en/latest/plugins/openid-connect.md	Reworked EN plugin doc structure, attributes table, and examples with tabs; adds “User Info” section.

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[kayx23]

The new Kubernetes examples still reference an httpbin backend, but unlike the other plugin docs in this batch the snippet does not define that Service/Upstream in the example itself. As written, both the Gateway API backendRefs: - name: httpbin example and the APISIX Ingress serviceName: httpbin example are incomplete and will not work unless readers already created that backend separately.