Add extracted source directory and README navigation

extracted-source/node_modules/@smithy/querystring-parser/dist-cjs/index.js

@@ -0,0 +1,27 @@
+'use strict';
+
+function parseQueryString(querystring) {
+    const query = {};
+    querystring = querystring.replace(/^\?/, "");
+    if (querystring) {
+        for (const pair of querystring.split("&")) {
+            let [key, value = null] = pair.split("=");
+            key = decodeURIComponent(key);
+            if (value) {
+                value = decodeURIComponent(value);
+            }
+            if (!(key in query)) {
+                query[key] = value;
+            }
+            else if (Array.isArray(query[key])) {
+                query[key].push(value);
+            }
+            else {
+                query[key] = [query[key], value];
+            }
+        }
+    }
+    return query;
+}
+
+exports.parseQueryString = parseQueryString;