[WIP] Fix build failure issue in continuous integration

[Copilot]

• Analyze the repository structure and understand it's a Cardputer (ESP32) firmware project
• Identify that MSBuild CI workflow is incorrect for ESP32 projects
• Request clarification from user on Evil Portal integration requirements
• Fix CI workflow to support ESP32/PlatformIO builds
• Integrate Evil Portal functionality based on user clarification
• Test the build locally
• Verify CI passes

Original prompt

Reference: https://github.com/Crashkeyz/UltimatumCardputerKey/actions/runs/20511152392/job/59097602695

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[Crashkeyz]

@copilot try again id like to acess firmware through evil portal

[Copilot]

@copilot try again id like to acess firmware through evil portal

I understand you want to integrate Evil Portal functionality into the Cardputer firmware. Could you clarify what you mean by "access firmware through evil portal"?

Are you looking for:

1. A WiFi captive portal feature (Evil Portal) to be included in the firmware
2. The ability to upload/update firmware via an Evil Portal web interface
3. Integration with an existing Evil Portal project

Also, the current MSBuild CI workflow is failing because it's configured for Windows/C# projects, but this appears to be an ESP32-based firmware project that would need PlatformIO or Arduino build tools instead. Should I also fix the CI configuration for ESP32 builds?