feat: add tag-triggered release workflow

[lyx-tec]

Add a tag-triggered release workflow (
elease-tag.yml) that builds and packages installers for all platforms.

Features:

• Trigger: push tag \�*\ or manual \workflow_dispatch\
• Platforms: macOS (x64 + arm64), Linux (x64 + arm64), Windows (x64)
• Skips code signing and S3 upload (not needed on fork)
• Auto-creates a draft GitHub Release with all artifacts attached

Compared to the original \�uild-helper.yml, this workflow:

• Does not require a GitHub App Token
• Does not require code signing certificates
• Does not require AWS S3 credentials
• Uses only \GITHUB_TOKEN\ (available by default on forks)