feat: support auto-selection and pre-check for function call and reasoning paser.

[RobbieLeung]

No description provided.

[gemini-code-assist]

Code Review

This pull request introduces a valuable feature for automatically selecting function call and reasoning parsers based on the model type, which improves usability. The implementation also includes pre-checks for parser support. The changes are mostly in the parser logic and flag handling.

My review identifies a critical issue that could lead to a crash, along with several high-severity issues related to maintainability and code consistency. I've provided suggestions to address these points, including using more robust and extensible patterns for factory functions and error message generation.

[RobbieLeung]

/gemini review

[gemini-code-assist]

Code Review

This pull request introduces an excellent feature for auto-selecting and pre-checking function call and reasoning parsers based on the model type, which significantly improves usability and robustness. The refactoring to use factory maps for creating detectors is a great enhancement for code maintainability. I've identified a high-severity bug in the error message generation for the reasoning parser, which could lead to user confusion, and have provided a detailed comment with a suggested fix.