tutorial updated with DAC use for coding-assistant

[ilaydatemir]

Summary

This PR adds a practical guide for configuring Cline to use OCI Generative AI models through OCI’s OpenAI-compatible API.

The guide explains why developers might connect Cline to OCI Generative AI, including support for code explanation, file generation, refactoring, test writing, debugging, and repository summarization directly from the IDE.

What Changed

• Added setup instructions for using Cline with OCI Generative AI through the OpenAI Compatible provider.
• Explained the difference between on-demand OCI Generative AI models and Dedicated AI Cluster (DAC)-hosted models.
• Documented the different endpoint formats:
  • On-demand: /openai/v1
  • DAC-hosted: /openai/v1/chat/completions
• Clarified that on-demand models use the OCI Model Name, while DAC-hosted models use the DAC endpoint OCID.
• Added DAC benefits, including isolation, predictable latency, fine-tuning support, cost efficiency at scale, and deployment near data.
• Included configuration, testing, troubleshooting, cleanup, and reference sections.