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/bluebird/js/release/direct_resolve.js

@@ -0,0 +1,46 @@
+"use strict";
+module.exports = function(Promise) {
+function returner() {
+    return this.value;
+}
+function thrower() {
+    throw this.reason;
+}
+
+Promise.prototype["return"] =
+Promise.prototype.thenReturn = function (value) {
+    if (value instanceof Promise) value.suppressUnhandledRejections();
+    return this._then(
+        returner, undefined, undefined, {value: value}, undefined);
+};
+
+Promise.prototype["throw"] =
+Promise.prototype.thenThrow = function (reason) {
+    return this._then(
+        thrower, undefined, undefined, {reason: reason}, undefined);
+};
+
+Promise.prototype.catchThrow = function (reason) {
+    if (arguments.length <= 1) {
+        return this._then(
+            undefined, thrower, undefined, {reason: reason}, undefined);
+    } else {
+        var _reason = arguments[1];
+        var handler = function() {throw _reason;};
+        return this.caught(reason, handler);
+    }
+};
+
+Promise.prototype.catchReturn = function (value) {
+    if (arguments.length <= 1) {
+        if (value instanceof Promise) value.suppressUnhandledRejections();
+        return this._then(
+            undefined, returner, undefined, {value: value}, undefined);
+    } else {
+        var _value = arguments[1];
+        if (_value instanceof Promise) _value.suppressUnhandledRejections();
+        var handler = function() {return _value;};
+        return this.caught(value, handler);
+    }
+};
+};