Add agpl to installer and install extension in GH actions

.github/workflows/windows.yaml

@@ -94,10 +94,11 @@ jobs:
       - name: Install WiX
         run: |
           dotnet tool install --global wix
-          dotnet add package WixToolset.UI.wixext
+          wix extension add WixToolset.UI.wixext
       - name: Copy wix file to dist
         run: 
           Copy-Item -Verbose resources/windows/syng.wxs work/install/dist/syng.wxs
+          Copy-Item -Verbose resources/windows/agpl-3.0.rtf work/install/dist/agpl-3.0.rtf
       - name: Build WiX on Windows
         run: wix build -ext WixToolset.UI.wixext .\syng.wxs
         working-directory: ./work/install/dist

resources/windows/syng.wxs

@@ -5,10 +5,12 @@
              Name="Syng"
              Scope="perUserOrMachine"
              UpgradeCode="092e7e0b-5042-47a1-9673-544d9722f8df"
+             ProductCode="*"
              Version="2.1.0">
         <MediaTemplate EmbedCab="yes" />
         <MajorUpgrade DowngradeErrorMessage="A later version of [ProductName] is already installed. Setup will now exit." />
         <ui:WixUI Id="WixUI_InstallDir" InstallDirectory="INSTALLFOLDER" />
+        <WixVariable Id="WixUILicenseRtf" Value="agpl-3.0.rtf" />
         <Icon Id="syng.ico" SourceFile="..\syng.ico"/>
         <Property Id="ARPPRODUCTICON" Value="syng.ico" />
         <StandardDirectory Id="ProgramFilesFolder">
@@ -22,6 +24,11 @@
                               Icon="syng.ico"
                               IconIndex="0"
                               Advertise="yes" />
+                    <Shortcut Id="UninstallProduct"
+                            Name="Uninstall Syng"
+                            Target="[SystemFolder]msiexec.exe"
+                            Arguments="/x [ProductCode]"
+                            Description="Uninstalls Syng" />
                     <Shortcut Id="desktopShortcut"
                               Directory="DesktopFolder"
                               Name="syng"