Expand navigationFallback.exclude for static assets

Broadened the exclude list in staticwebapp.config.json to cover framework, content, JS directories, and common static file extensions. This prevents these assets from being rewritten to /index.html by the SPA fallback.

Author: gvreddy04

BlazorExpress.ChartJS.Demo.WebAssembly/wwwroot/staticwebapp.config.json

@@ -1,6 +1,13 @@
 {
   "navigationFallback": {
     "rewrite": "/index.html",
-    "exclude": [ "/images/*.{png,jpg,gif}", "/css/*" ]
+    "exclude": [
+      "/_framework/*",
+      "/_content/*",
+      "/images/*.{png,jpg,gif}",
+      "/css/*",
+      "/js/*",
+      "*.{png,jpg,gif,ico,webp,svg,wasm}"
+    ]
   }
 }