remove node_modules and .gitignore them

node_modules/@smithy/node-http-handler/dist-es/readable.mock.js

@@ -1,19 +0,0 @@
-import { Readable } from "stream";
-export class ReadFromBuffers extends Readable {
-    constructor(options) {
-        super(options);
-        this.numBuffersRead = 0;
-        this.buffersToRead = options.buffers;
-        this.errorAfter = typeof options.errorAfter === "number" ? options.errorAfter : -1;
-    }
-    _read() {
-        if (this.errorAfter !== -1 && this.errorAfter === this.numBuffersRead) {
-            this.emit("error", new Error("Mock Error"));
-            return;
-        }
-        if (this.numBuffersRead >= this.buffersToRead.length) {
-            return this.push(null);
-        }
-        return this.push(this.buffersToRead[this.numBuffersRead++]);
-    }
-}