fix(ai-gateway): Align providers docs with 0.0.47 API schema

[tomek-labuk]

Description

This PR updates AI Provider entity docs, and aligns them with the latest API schema. Recap of changes:

AI Model Provider

• Renamed the old entity from AI Provider to AI Model Provider
• Added paragraph distinguishing outbound credentials (AI Model Provider authenticates to the upstream LLM) from inbound authentication (AI Identity Provider validates the AI Consumer calling the model)
• Added AI Identity Provider to related_resources

AI Identity Provider (new file)

• Created aew entity reference page covering key-auth and openid-connect provider types
• Documented per-model assignment via access.identity_providers, one provider per type per model maximum
• Covered anonymous consumer fallback behavior (unauthenticated requests terminate with 401)
• Added a note that all models in the same gateway sharing OIDC auth must reference the same openid-connect identity provider
• client_secret on the OIDC type is referenceable from an AI Vault
• Fixed access.acls code example to use correct allow/deny object shape per v0.0.47 spec

Context here

Note:
This affects all other AI Gateway 2.0 documentation, I will be opening up PRs against this branch with various updates.

Preview Links

https://deploy-preview-5875--kongdeveloper.netlify.app/ai-gateway/entities/ai-model-provider
https://deploy-preview-5875--kongdeveloper.netlify.app/ai-gateway/entities/ai-identity-provider

Checklist

• Tested how-to docs. If not, note why here.
• All pages contain metadata.
• Any new docs link to existing docs.
• All autogenerated instructions render correctly (API, decK, Konnect, Kong Manager).
• Style guide (capitalized gateway entities, placeholder URLs) implemented correctly.
• Every page has a description entry in frontmatter.
• Add new pages to the product documentation index (if applicable).

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[Copilot]

Pull request overview

Updates AI Gateway entity reference docs to reflect the v0.0.47 Konnect AI Gateway API schema, including renaming the “AI Provider” entity concept to “AI Model Provider” and adding a new “AI Identity Provider” entity page for inbound authentication.

Changes:

• Updated the AI Provider entity reference page to “AI Model Provider”, including schema path + API endpoint changes and new outbound-vs-inbound auth explanation.
• Added a new AI Identity Provider entity reference page documenting key-auth and openid-connect identity provider types and AI Model assignment.
• Extended entity_examples config to support model-provider and identity-provider endpoints and expose identity providers in the UI format list.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 7 comments.

File	Description
app/_data/entity_examples/config.yml	Adds AI Gateway endpoint mappings for new entity-example types and updates UI-supported AI Gateway entities.
app/_ai_gateway_entities/ai-provider.md	Renames the entity doc to AI Model Provider, updates schema/API paths, and expands explanation of provider roles.
app/_ai_gateway_entities/ai-identity-provider.md	Introduces a new entity reference page for inbound authentication providers (key-auth and OIDC).

[CLAassistant]

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✅ tomek-labuk
❌ Copilot
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[cloudjumpercat]

Mostly nitpicks for everything! Just had one section about AI Model Provider authentication that I think could use more specific language.