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/@webassemblyjs/helper-wasm-bytecode/esm/section.js

@@ -0,0 +1,31 @@
+export function getSectionForNode(n) {
+  switch (n.type) {
+    case "ModuleImport":
+      return "import";
+
+    case "CallInstruction":
+    case "CallIndirectInstruction":
+    case "Func":
+    case "Instr":
+      return "code";
+
+    case "ModuleExport":
+      return "export";
+
+    case "Start":
+      return "start";
+
+    case "TypeInstruction":
+      return "type";
+
+    case "IndexInFuncSection":
+      return "func";
+
+    case "Global":
+      return "global";
+    // No section
+
+    default:
+      return;
+  }
+}