Adding an LLM Inference Service Tutorials page

[SeanCondon]

Adding a new Tutorials page under Model Serving -> Generative Inference -> LLMInference to point to the docs/samples/llmisvc tutorials in the main website as suggested by @sivanantha321

Note: Now that PR 5150 on kserve has been merged, this can be reviewed.

Proposed Changes

• Add a new tutorials.md to the website
• Fix a header in llmisvc-envoy-ai-gateway.md

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[Copilot]

Pull request overview

Adds a Tutorials landing page under Model Serving → Generative Inference → LLMInferenceService to direct users to the upstream kserve/kserve LLMInferenceService tutorial content, and updates sidebar metadata for the Envoy AI Gateway tutorial page to improve navigation.

Changes:

• Add docs/model-serving/generative-inference/llmisvc/tutorials.md with links to upstream LLMInferenceService tutorial directories.
• Register the new Tutorials page in sidebars.ts under the LLMInferenceService section.
• Add missing sidebar frontmatter (sidebar_label, sidebar_position) to llmisvc-envoy-ai-gateway.md.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
sidebars.ts	Adds the new Tutorials doc to the LLMInferenceService sidebar entries.
docs/model-serving/generative-inference/llmisvc/tutorials.md	New Tutorials landing page linking to upstream kserve/kserve tutorial content.
docs/model-serving/generative-inference/llmisvc/llmisvc-envoy-ai-gateway.md	Adds sidebar metadata to improve labeling/ordering in the docs nav.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

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[SeanCondon]

Reviewers, can you take a look at this please? @alexagriffith @theofpa
It's based off a review comment made when I was adding a sample for llmisvc over on the main kserve repo.