[Rust Frontend] Introduce unified parser interface & combined parser (#46583)

Signed-off-by: Bugen Zhao <i@bugenzhao.com>

rust/src/parser/python/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "vllm-tool-parser-py"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+
+[lib]
+name = "_rust_tool_parser"
+crate-type = ["cdylib", "rlib"]
+
+[dependencies]
+pyo3.workspace = true
+pythonize = { workspace = true, features = ["serde_json"] }
+serde_json.workspace = true
+thiserror-ext.workspace = true
+vllm-parser.workspace = true
+
+[lints]
+workspace = true