初始化Rust示例项目ex01，包含基础项目结构和"Hello, world!"示例

.gitignore

@@ -0,0 +1 @@
+target/

examples/ex01/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "ex01"
+version = "0.1.0"

examples/ex01/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "ex01"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

examples/ex01/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}