Implement tool calling for Ollama and include examples

[kalrasamridhi7]

Description

This PR implements tool calling functionality from LLMInterface for Ollama. Also provides an example for it.

Type of Change

• New feature
• Bug fix
• Breaking change
• Documentation update
• Project configuration change

Complexity

Complexity: Medium

How Has This Been Tested?

• Unit tests
• E2E tests
• Manual tests

Checklist

The following requirements should have been met (depending on the changes in the branch):

• Documentation has been updated
• Unit tests have been updated
• E2E tests have been updated
• Examples have been updated
• New files have copyright header
• CLA (https://neo4j.com/developer/cla/) has been signed
• CHANGELOG.md updated if appropriate

[kalrasamridhi7]

@CodiumAI-Agent /update_changelog

[CodiumAI-Agent]

Changelog updates: 🔄

2025-10-25 *

Added

• Tool calling support for Ollama in LLMInterface, including sync/async APIs
• Example demonstrating Ollama tool calls and updated examples index

Tested

• Unit tests and manual testing for new Ollama tool calling functionality

to commit the new content to the CHANGELOG.md file, please type:
'/update_changelog --pr_update_changelog.push_changelog_changes=true'