Create cmake-multi-platform.yml

[laolarou726]

PR-Codex overview

This PR introduces a GitHub Actions workflow file for building a CMake project across multiple platforms, specifically targeting windows-latest. It sets up a CI process that triggers on pushes and pull requests to the main branch.

Detailed summary

• Added .github/workflows/cmake-multi-platform.yml file.
• Defined a workflow named CMake on multiple platforms.
• Configured the workflow to trigger on pushes and pull requests to the main branch.
• Specified a job named build that runs on windows-latest.
• Included a build step that executes a PowerShell script to build the project.

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