feat: implement thinking configuration resolution and variant mapping

[kfiramar]

Summary

This PR implements the thinking configuration resolution logic, enabling the extraction of thinking budgets and variant mappings for model requests. It ensures that token budgets are correctly resolved based on model suffixes, explicit configurations, or variant presets.

Key Features

• Thinking Configuration Resolution: Added resolveThinkingConfig to handle logic for enabling thinking and determining token budgets.
• Variant Mapping: Implemented mapping for low, medium, high, and max variants to their respective token budgets (8k, 16k, 32k).
• Backward Compatibility: Supports max as an alias for the high variant.
• Explicit Overrides: Supports explicit thinkingBudget overrides within providerOptions.thinkingConfig.

Testing

• Added comprehensive unit tests in test/thinking.test.js covering:
  • Model suffix detection (-thinking).
  • Explicit budget overrides.
  • Variant-to-budget mapping.
  • Backward compatibility for the max variant.

[tickernelz]

i dont know what you're trying to achive in your PRs bro. i see alot of unneeded changes. some of your PRs dont actually fix anything. i think you're creating all your PR all by AI. im sorry but i dont see the critical fixes in all your PRs. im closing it all

[kfiramar]

Asking what I'm trying to achieve in each PR is one question, closing PRs that fix broken code without any note (after you asked for it) is something else... About AI, yeah - surprisingly I did use AI for help (shocker), mostly to break down the PRs you asked

About it being broken, you're free to look at opencode Kiro PRs, discussing this project and that it does not work

You've lost a maintainer, Good luck!