fix(e2e): add LICENSE.txt, icon.png, and preview.png for SourceGenerators test

Author: CalvinAllen

tests/e2e/E2E.SourceGenerators/E2E.SourceGenerators.csproj

@@ -18,4 +18,17 @@
     <PackageReference Include="Microsoft.VisualStudio.SDK" Version="17.*" />
   </ItemGroup>
 
+  <!-- Include assets referenced in manifest -->
+  <ItemGroup>
+    <Content Include="LICENSE.txt">
+      <IncludeInVSIX>true</IncludeInVSIX>
+    </Content>
+    <Content Include="icon.png">
+      <IncludeInVSIX>true</IncludeInVSIX>
+    </Content>
+    <Content Include="preview.png">
+      <IncludeInVSIX>true</IncludeInVSIX>
+    </Content>
+  </ItemGroup>
+
 </Project>

tests/e2e/E2E.SourceGenerators/LICENSE.txt

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) E2E Tests
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.