Add .gitignore to exclude all node packages and lock files

skills/remotion-prompt-video/node_modules/recast/example/identity

@@ -0,0 +1,8 @@
+#!/usr/bin/env node
+
+// This script should echo the contents of the given file without
+// modification.
+
+require("recast").run(function(ast, callback) {
+    callback(ast);
+});