✨ feat: Add Google Parameters, Ollama/Openrouter Reasoning, & UI Optimizations

[danny-avila]

Summary

• Replaced ::: directive tags with a more XML-like syntax in both the frontend and the OpenAI client, conforming to Ollama format
  • they are then replaced to required ::: directive format in the frontend
• Moved google model parameters to the SidePanel
  • Closes #Enhancement: Migrate Google to the new Parameters UI #5443
• Improved dynamic input parsing to correctly handle numeric values
• Prevented the Thinking component from rendering null children
• Virtualized the combobox for large data sets to enhance performance
  • This was causing significant slowdowns during streaming when using an endpoint with many models, such as Openrouter
• Simplified various components by removing unused contexts and clarifying plugin configurations

Change Type

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Testing

I ran local unit tests to ensure the new google model parameters function correctly. I also tested the updated Markdown and dynamic numeric input changes in a development environment to confirm that the replacement renders properly and numeric inputs preserve their intended values. Additionally, I suggest verifying with a wide range of model/agent lists to confirm combobox virtualization performance.

Checklist

• My code adheres to this project's style guidelines
• I have performed a self-review of my own code
• I have commented in any complex areas of my code
• I have made pertinent documentation changes
• My changes do not introduce new warnings
• I have written tests demonstrating that my changes are effective
• Local unit tests pass with my changes
• Any changes dependent on mine have been merged and published in downstream modules.