cat initial implementation- no flags yet

Author: Pezhman-Azizi

implement-shell-tools/cat/.gitignore

@@ -0,0 +1,2 @@
+node_modules
+.DS_Store

implement-shell-tools/cat/cat.js

@@ -0,0 +1,17 @@
+#!/usr/bin/env node
+// cat.js — scaffold (no functionality yet)
+// Next commits will add:
+//   - basic file output
+//   - -n (number all lines)
+//   - -b (number non-blank)
+
+function main() {
+  const args = process.argv.slice(2);
+  if (args.length === 0) {
+    console.error("Usage: node cat.js <file...>");
+    process.exit(1);
+  }
+  console.log("cat: scaffold ready (implementation comes in next commit)");
+}
+
+if (require.main === module) main();