Fix PostBuildEvent to skip copy if mIRC directory doesn't exist

- Modified PostBuildEvent to check if C:\mIRC exists before copying
- Prevents CI build failure on GitHub Actions where mIRC is not installed
- Local development builds will still auto-copy DLL and script to mIRC

Fixes: MSB3073 error in GitHub Actions workflow

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>

Author: r0073rr0r

e2e.vcxproj

@@ -119,8 +119,7 @@
       <OptimizeReferences>true</OptimizeReferences>
     </Link>
     <PostBuildEvent>
-      <Command>copy /Y "$(OutDir)e2e.dll" "C:\mIRC\e2e.dll"
-copy /Y "$(ProjectDir)e2e.mrc" "C:\mIRC\e2e.mrc"</Command>
+      <Command>if exist "C:\mIRC\" (copy /Y "$(OutDir)e2e.dll" "C:\mIRC\e2e.dll" &amp; copy /Y "$(ProjectDir)e2e.mrc" "C:\mIRC\e2e.mrc")</Command>
     </PostBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">