feat: Publish a Scoop manifest with each release

[razor-x]

Add Scoop support for Windows by generating a Scoop manifest as a release asset.

Summary

The publish.yml release job now generates seam.json — a Scoop manifest pinning the Windows binary's SHA-256 from checksums.txt — and uploads it alongside the other release assets. Windows users install with

scoop install https://github.com/seamapi/cli/releases/latest/download/seam.json

and update with scoop update seam, which re-fetches the manifest from that URL. Since releases/latest only points at stable releases, installs always track the newest stable version.

Key changes

• .github/workflows/publish.yml: a Generate Scoop manifest step in the release job builds release/seam.json with jq (mirroring the AUR PKGBUILD generation pattern), extracting the seam-v<version>-windows-x64.exe hash from checksums.txt and failing the release if the entry is missing. The manifest is added to the uploaded release files.
• README.md: a Scoop section under Installation with the install and update commands.

Notable details

• The #/seam.exe URL fragment makes Scoop rename the versioned download to seam.exe, exposed via bin.
• The manifest includes checkver and autoupdate sections, so it can be dropped into a Scoop bucket (own bucket or a community-bucket submission) later with no changes.
• The manifest was validated against Scoop's official schema, generated locally from the real v0.29.0 release data.
• The first release cut after this merges will be the first to carry the seam.json asset; the releases/latest/download/seam.json URL resolves from then on.

🤖 Generated with Claude Code

https://claude.ai/code/session_01LtYdE6UGg6ZR7ieqS5YpHt

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