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/nopt/lib/nopt.js

@@ -0,0 +1,30 @@
+const lib = require('./nopt-lib')
+const defaultTypeDefs = require('./type-defs')
+
+// This is the version of nopt's API that requires setting typeDefs and invalidHandler
+// on the required `nopt` object since it is a singleton. To not do a breaking change
+// an API that requires all options be passed in is located in `nopt-lib.js` and
+// exported here as lib.
+// TODO(breaking): make API only work in non-singleton mode
+
+module.exports = exports = nopt
+exports.clean = clean
+exports.typeDefs = defaultTypeDefs
+exports.lib = lib
+
+function nopt (types, shorthands, args = process.argv, slice = 2) {
+  return lib.nopt(args.slice(slice), {
+    types: types || {},
+    shorthands: shorthands || {},
+    typeDefs: exports.typeDefs,
+    invalidHandler: exports.invalidHandler,
+  })
+}
+
+function clean (data, types, typeDefs = exports.typeDefs) {
+  return lib.clean(data, {
+    types: types || {},
+    typeDefs,
+    invalidHandler: exports.invalidHandler,
+  })
+}