ci: Windows向けビルドをリリースワークフローに追加

[tact-software]

• windows-latestランナーをビルドマトリックスに追加
• MSI/NSISインストーラーの成果物パスを追加
• GitHubリリースにWindows向けアーティファクトを含める

Description

Please include a summary of the changes and which issue is fixed. Include relevant motivation and context.

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Performance improvement
• Code refactoring

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce.

• Test A
• Test B

Test Configuration:

• OS: [e.g. Windows 11, macOS 14.0, Ubuntu 22.04]
• COAV Version: [e.g. commit hash or version]
• Hardware specs if relevant:

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have updated the CHANGELOG.md file with my changes

Screenshots (if appropriate):

Please add screenshots to help explain your changes.

Additional Notes

Add any additional notes or context about the pull request here.