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

sgl-router/src/tool_parser/mod.rs

@@ -1,30 +1,27 @@
 /// Tool parser module for handling function/tool calls in model outputs
 ///
 /// This module provides infrastructure for parsing tool calls from various model formats.
+// Core modules
 pub mod errors;
-pub mod json_parser;
-pub mod llama_parser;
-pub mod mistral_parser;
 pub mod partial_json;
 pub mod python_literal_parser;
-pub mod pythonic_parser;
-pub mod qwen_parser;
 pub mod registry;
 pub mod state;
 pub mod traits;
 pub mod types;
 
+// Parser implementations
+pub mod parsers;
+
 #[cfg(test)]
 mod tests;
 
 // Re-export commonly used types
 pub use errors::{ToolParserError, ToolParserResult};
-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;
 pub use registry::ParserRegistry;
 pub use state::{ParsePhase, ParseState};
 pub use traits::{PartialJsonParser, ToolParser};
 pub use types::{FunctionCall, PartialToolCall, StreamResult, TokenConfig, ToolCall};
+
+// Re-export parsers for convenience
+pub use parsers::{JsonParser, LlamaParser, MistralParser, PythonicParser, QwenParser};