replace brocli with commander, fix type errors, add ascii art

tsup.config.ts

@@ -1,11 +1,14 @@
 import { defineConfig } from "tsup";
 
 export default defineConfig({
-	entry: ["src/index.ts"],
-	format: ["esm"],
-	clean: true,
-	dts: true,
-	shims: true,
-	splitting: false,
-	outDir: "dist",
+  entry: ["src/index.ts"],
+  format: ["esm"],
+  clean: true,
+  dts: true,
+  shims: true,
+  splitting: false,
+  outDir: "dist",
+  banner: {
+    js: "#!/usr/bin/env node",
+  },
 });