build: add Bazel Rust workflow

src/machoke/BUILD

@@ -0,0 +1,13 @@
+load("@rules_rust//rust:defs.bzl", "rust_binary", "rust_library")
+
+rust_library(
+    name = "machoke_lib",
+    crate_name = "machoke",
+    srcs = ["lib.rs"],
+)
+
+rust_binary(
+    name = "machoke",
+    srcs = ["main.rs"],
+    deps = [":machoke_lib"],
+)

src/machoke/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "machoke"
+version = "0.1.0"

src/machoke/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "machoke"
+version = "0.1.0"
+edition = "2024"
+
+[lib]
+path = "lib.rs"
+
+[[bin]]
+name = "machoke"
+path = "main.rs"
+
+[dependencies]

src/machoke/lib.rs

@@ -0,0 +1,3 @@
+pub fn greeting() -> &'static str {
+    "Hello from machoke"
+}

src/machoke/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("{}", machoke::greeting());
+}