[router] restructure tool parser module folder (#9693)

sgl-router/src/tool_parser/parsers/mod.rs

@@ -0,0 +1,16 @@
+/// Parser implementations for different model formats
+///
+/// This module contains concrete parser implementations for various model-specific
+/// tool/function call formats.
+// Individual parser modules
+pub mod json_parser;
+pub mod llama_parser;
+pub mod mistral_parser;
+pub mod pythonic_parser;
+pub mod qwen_parser;
+
+pub use json_parser::JsonParser;
+pub use llama_parser::LlamaParser;
+pub use mistral_parser::MistralParser;
+pub use pythonic_parser::PythonicParser;
+pub use qwen_parser::QwenParser;