Add extracted source directory and README navigation

extracted-source/node_modules/lodash-es/_baseSample.js

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+import arraySample from './_arraySample.js';
+import values from './values.js';
+
+/**
+ * The base implementation of `_.sample`.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to sample.
+ * @returns {*} Returns the random element.
+ */
+function baseSample(collection) {
+  return arraySample(values(collection));
+}
+
+export default baseSample;