feat(swc/cli): setup packages for binary

- relates with swc-project#1589

Cargo.toml

@@ -2,6 +2,7 @@
 members = [
   "crates/jsdoc",
   "crates/node",
+  "crates/swc_cli",
   "crates/swc_css",
   "crates/swc_ecmascript",
   "crates/swc_ecma_plugin_ast",

crates/swc_cli/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+description = "Commandline for swc"
+name = "swc_cli"
+version = "0.1.0"
+edition = "2018"
+include = ["Cargo.toml", "src/**/*.rs"]
+license = "Apache-2.0"
+repository = "https://github.com/swc-project/swc.git"
+
+[[bin]]
+name = "swc"
+path = "./src/main.rs"
+
+[dependencies]
+structopt = { version = "0.3.25", features = [ "paw" ] }
+paw = "1.0"

crates/swc_cli/src/cli.rs

@@ -0,0 +1,37 @@
+use std::path::PathBuf;
+
+use structopt::StructOpt;
+
+/// Transform, compile files.
+#[derive(Debug, StructOpt)]
+struct CompileCommand {
+    ///Filename to use when reading from stdin - this will be used in
+    /// source-maps, errors etc
+    #[structopt(short = "f", long = "filename")]
+    file_name: String,
+    /// Path to a .swcrc file to use
+    #[structopt(parse(from_os_str), long = "config-file")]
+    config_file: PathBuf,
+    /// The name of the 'env' to use when loading configs and plugins.
+    /// Defaults to the value of SWC_ENV, or else NODE_ENV, or else
+    /// 'development'.
+    ///
+    /// DEPRECATED: use --env flag instead.
+    #[structopt(long = "env-name")]
+    env_name: String,
+}
+
+#[derive(StructOpt, Debug)]
+#[structopt(about = "Speedy Web Compiler")]
+pub enum SwcCommand {
+    Compile(CompileCommand),
+}
+
+impl SwcCommand {
+    pub fn execute(self) {
+        match self {
+            Self::Compile => {}
+        };
+        Ok(())
+    }
+}

crates/swc_cli/src/main.rs

@@ -0,0 +1,6 @@
+use cli::SwcCommand;
+
+#[paw::main]
+fn main(_args: SwcCommand) {
+    unimplemented!("Not yet implemented");
+}