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/fast-uri/test/util.test.js

@@ -0,0 +1,23 @@
+'use strict'
+
+const test = require('tape')
+const {
+  stringArrayToHexStripped
+} = require('../lib/utils')
+
+test('stringArrayToHexStripped', (t) => {
+  const testCases = [
+    [[['0', '0', '0', '0']], ''],
+    [[['0', '0', '0', '0'], false], ''],
+    [[['0', '0', '0', '0'], true], '0'],
+    [[['0', '1', '0', '0'], false], '100'],
+    [[['1', '0', '0', '0'], false], '1000'],
+    [[['1', '0', '0', '0'], true], '1000']
+  ]
+
+  t.plan(testCases.length)
+
+  testCases.forEach(([input, expected]) => {
+    t.same(stringArrayToHexStripped(input[0], input[1]), expected)
+  })
+})