[router] add harmony tool parser base structure and interface (#11036)

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

@@ -5,6 +5,7 @@
 // Individual parser modules
 pub mod deepseek_parser;
 pub mod glm4_moe_parser;
+pub mod gpt_oss_harmony_parser;
 pub mod gpt_oss_parser;
 pub mod json_parser;
 pub mod kimik2_parser;
@@ -17,6 +18,7 @@ pub mod step3_parser;
 // Re-export parser types for convenience
 pub use deepseek_parser::DeepSeekParser;
 pub use glm4_moe_parser::Glm4MoeParser;
+pub use gpt_oss_harmony_parser::GptOssHarmonyParser;
 pub use gpt_oss_parser::GptOssParser;
 pub use json_parser::JsonParser;
 pub use kimik2_parser::KimiK2Parser;