docs(agent): Add ollama instruction docs

[dstripelis]

Summary

Add a new guide explaining how to run a Flower AgentApp locally with Ollama.

Why

Developers need a documented way to use Flower Agent without a Flower account or external model API key. Ollama provides a local OpenAI-compatible Responses endpoint that can be connected to a local SuperLink.

What

• Adds the Run an AgentApp with Ollama guide.
• Documents the required AgentApp and Flower project configuration.
• Explains how to install and start Ollama and pull a model.
• Configures SuperLink to use Ollama’s /v1/responses endpoint.
• Shows how to run the app and override its model and prompt.
• Includes troubleshooting steps for common Ollama and SuperLink issues.
• Adds the guide to the Agent documentation navigation immediately after the local SuperLink guide.

[Copilot]

Pull request overview

Adds a new Agent documentation guide describing how to run a Flower AgentApp fully locally by connecting a local SuperLink to Ollama’s OpenAI-compatible Responses endpoint, avoiding the need for a Flower account or external model API keys.

Changes:

• Adds a new how-to guide: “Run an AgentApp with a local SuperLink and Ollama”.
• Documents required project setup (AgentApp, pyproject.toml), Ollama setup, SuperLink configuration, and basic troubleshooting.
• Adds the new guide to the Agent docs navigation immediately after the local SuperLink guide.

Critical issues

• None found.

Simplicity/readability suggestions

• None required.

Consistency concerns

• None found (the guide aligns with the existing local SuperLink guide patterns, including FLWR_MODEL_API_ENDPOINT using a full /v1/responses URL).

Whether the PR should be split

• No.

Overall verdict

• Looks ready as a documentation-only addition with consistent setup and commands.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
agent/docs/source/index.md	Adds the new Ollama guide to the Agent docs toctree immediately after the local SuperLink guide.
agent/docs/source/how-to-guides/run-with-ollama.md	New end-to-end guide for running an AgentApp locally using SuperLink + Ollama’s /v1/responses endpoint, including troubleshooting.

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