moved rust implementation to /src/main/rust

src/main/rust/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "rust"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+bstr = "1.9.1"
+fast-float = "0.2.0"
+hashbrown = "0.14.3"
+memchr = "2.7.4"
+memmap = "0.7.0"
+polars = { version = "0.36.2", features = ["csv", "lazy", "nightly", "streaming"]}
+rayon = "1.10.0"
+rustc-hash = "2.0.0"
+
+[build]
+rustflags = ["-C target-cpu=native"]