chore: add project dependencies and configuration files

Initial setup of project dependencies including axios, express, dotenv, and other supporting packages. Added configuration files and documentation for project setup and usage.

node_modules/axios/lib/helpers/AxiosURLSearchParams.js

@@ -0,0 +1,58 @@
+'use strict';
+
+import toFormData from './toFormData.js';
+
+/**
+ * It encodes a string by replacing all characters that are not in the unreserved set with
+ * their percent-encoded equivalents
+ *
+ * @param {string} str - The string to encode.
+ *
+ * @returns {string} The encoded string.
+ */
+function encode(str) {
+  const charMap = {
+    '!': '%21',
+    "'": '%27',
+    '(': '%28',
+    ')': '%29',
+    '~': '%7E',
+    '%20': '+',
+    '%00': '\x00'
+  };
+  return encodeURIComponent(str).replace(/[!'()~]|%20|%00/g, function replacer(match) {
+    return charMap[match];
+  });
+}
+
+/**
+ * It takes a params object and converts it to a FormData object
+ *
+ * @param {Object<string, any>} params - The parameters to be converted to a FormData object.
+ * @param {Object<string, any>} options - The options object passed to the Axios constructor.
+ *
+ * @returns {void}
+ */
+function AxiosURLSearchParams(params, options) {
+  this._pairs = [];
+
+  params && toFormData(params, this, options);
+}
+
+const prototype = AxiosURLSearchParams.prototype;
+
+prototype.append = function append(name, value) {
+  this._pairs.push([name, value]);
+};
+
+prototype.toString = function toString(encoder) {
+  const _encode = encoder ? function(value) {
+    return encoder.call(this, value, encode);
+  } : encode;
+
+  return this._pairs.map(function each(pair) {
+    return _encode(pair[0]) + '=' + _encode(pair[1]);
+  }, '').join('&');
+};
+
+export default AxiosURLSearchParams;