feat(bundler/wix): install webview2 runtime (#1329)

* feat(bundler/wix): install webview2 runtime

* add changefile

Author: nklayman

.changes/wix-install-webview2.md

@@ -0,0 +1,5 @@
+---
+"tauri-bundler": minor
+---
+
+Automatically install Webview2 runtime alongside app.

cli/tauri-bundler/src/bundle/templates/main.wxs

@@ -147,6 +147,17 @@
             </Feature>
         </Feature>
 
+        <!-- WebView2 -->
+        <Property Id="WVRTINSTALLED">
+            <RegistrySearch Id="WVRTInstalled" Root="HKLM" Key="SOFTWARE\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}" Name="pv" Type="raw" Win64="no"/>
+        </Property>
+        <CustomAction Id='DownloadAndInvokeBootstrapper' Directory="INSTALLDIR" Execute="deferred" ExeCommand='powershell.exe -windowstyle hidden Invoke-WebRequest -Uri "https://go.microsoft.com/fwlink/p/?LinkId=2124703" -OutFile "$env:TEMP\MicrosoftEdgeWebview2Setup.exe" ; &amp; $env:TEMP\MicrosoftEdgeWebview2Setup.exe /install' Return='check'/>
+        <InstallExecuteSequence>
+            <Custom Action='DownloadAndInvokeBootstrapper' Before='InstallFinalize'>
+                <![CDATA[NOT(REMOVE OR WVRTINSTALLED)]]>
+            </Custom>
+        </InstallExecuteSequence>
+
         <SetProperty Id="ARPINSTALLLOCATION" Value="[INSTALLDIR]" After="CostFinalize"/>        
     </Product>
 </Wix>