feat(vs-extension): add AI Engineering Fluency icon to VSIX manifest (#526)

- Copy logo.png from vscode-extension/assets/ to visualstudio-extension assets
- Add <Icon> element to source.extension.vsixmanifest
- Register assets\logo.png in CopilotTokenTracker.csproj with IncludeInVSIX=true

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: rajbos

visualstudio-extension/src/CopilotTokenTracker/CopilotTokenTracker.csproj

@@ -75,6 +75,14 @@
       <DependentUpon>TokenTrackerControl.xaml</DependentUpon>
     </Compile>
   </ItemGroup>
+  <!-- Extension icon -->
+  <ItemGroup>
+    <Content Include="assets\logo.png">
+      <IncludeInVSIX>true</IncludeInVSIX>
+      <VSIXSubPath>assets\</VSIXSubPath>
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
   <!-- VSIX manifest -->
   <ItemGroup>
     <None Include="Properties\Settings.settings">

visualstudio-extension/src/CopilotTokenTracker/assets/logo.png

@@ -10,6 +10,7 @@
     <DisplayName>AI Engineering Fluency</DisplayName>
     <Description>Measure and grow your AI engineering fluency in Visual Studio. Tracks GitHub Copilot token usage, today's and last-30-days activity, per-model breakdowns, and detailed session analysis.</Description>
     <Tags>GitHub Copilot, token usage, AI, productivity</Tags>
+    <Icon>assets\logo.png</Icon>
   </Metadata>
 
   <Installation>