Add WASM parser and Vue dissector UI.

Ship a working HexPigeon: typed binary parsing in Rust/WASM, a three-pane frontend, and unit tests covering the field types.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/vitest.config.ts

@@ -0,0 +1,16 @@
+import { defineConfig } from 'vitest/config'
+import vue from '@vitejs/plugin-vue'
+import { fileURLToPath, URL } from 'node:url'
+
+export default defineConfig({
+  plugins: [vue()],
+  resolve: {
+    alias: {
+      '@': fileURLToPath(new URL('./src', import.meta.url)),
+    },
+  },
+  test: {
+    environment: 'node',
+    include: ['src/**/*.test.ts'],
+  },
+})