add web worker proxy using lighting container

Author: stomita

force-app/main/default/aura/LightningWebWorker/LightningWebWorker.cmp

@@ -0,0 +1,4 @@
+<aura:component >
+  <aura:attribute name="proxy" type="String" required="true" default="" />
+  <lightning:container class="invisible" src="{!v.proxy}" />
+</aura:component>

force-app/main/default/aura/LightningWebWorker/LightningWebWorker.cmp-meta.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<AuraDefinitionBundle xmlns="http://soap.sforce.com/2006/04/metadata">
+    <apiVersion>49.0</apiVersion>
+    <description>A Lightning Component Bundle</description>
+</AuraDefinitionBundle>

force-app/main/default/aura/LightningWebWorker/LightningWebWorker.css

@@ -0,0 +1,10 @@
+.THIS {
+  width: 0;
+  height: 0;
+}
+.THIS iframe.invisible {
+  width: 0;
+  height: 0;
+  outline: none;
+  visibility: hidden;
+}