feat: workspace 骨架 — core + cli 模块结构

cli/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "qrgen"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+
+[[bin]]
+name = "qrgen"
+path = "src/main.rs"
+
+[dependencies]
+qr-core = { path = "../core" }
+clap = { version = "4", features = ["derive"] }
+anyhow = "1"

cli/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("QRGen - 开发中");
+}