Initial commit: Developer Tools MVP with visual editor

- Complete React app with 7 developer tools
- JSON Tool with visual structured editor
- Serialize Tool with visual structured editor
- URL, Base64, CSV/JSON, Beautifier, Diff tools
- Responsive navigation with dropdown menu
- Dark/light mode toggle
- Mobile-responsive design with sticky header
- All tools working with copy/paste functionality

node_modules/adjust-sourcemap-loader/lib/process/get-field-as-fn.js

@@ -0,0 +1,14 @@
+'use strict';
+
+/**
+ * Create a method that will retrieve the given field from an object where that field has a function value
+ * @param {string} field The field to consider
+ * @returns {function(object):function} A method that gets functions from the given field
+ */
+function getFieldAsFn(field) {
+  return function getFromValue(value) {
+    return !!value && (typeof value === 'object') && (typeof value[field] === 'function') && value[field];
+  };
+}
+
+module.exports = getFieldAsFn;