added error handling

render.js

@@ -1,9 +1,27 @@
-window.electronAPI.updateProgress(async (_event, value) => {
+window.electronAPI.updateProgress((_event, value) => {
     console.log(_event)
     console.log(value)
     updateProgressStep(value);
 })
 
+window.electronAPI.handleError((_event, value) => {
+    let error = `
+    <div class="titlebar">NCOS Companion</div>
+    <div class="content">
+        <h1 class="centered">An Error Occured</h1>
+        <div class="row">
+            <div class="col-12">
+                <h4 class="centered">${value.label}</h4>
+                <h4 class="centered">pleas report this to <a class="link" target="_blank" href="https://github.com/Vortex-Dynamics/NervUpdaterClient/issues">us</a></h4>
+                <pre class="centered">${value.err}</pre>
+            </div>
+        </div>
+    </div>
+    `;
+
+    document.querySelector("body").innerHTML = error;
+})
+
 function updateProgressBar(progress){
     document.getElementById("progress-bar").style.width = progress + "%";
     document.getElementById("progress-label").textContent = progress + "%";