P2: winget/choco/scoop distribution

[Kinin-Code-Offical]

[Kinin-Code-Offical]

Plan

• Add a scoop/ bucket manifest for cloudsqlctl pointing at GitHub Release zip (cloudsqlctl-windows-x64.zip) so users can install via Scoop by adding this repo as a bucket.
• Add a chocolatey/ package skeleton (nuspec + install/uninstall scripts + verification) that installs from GitHub Release zip, plus a helper script to update version/hash from SHA256SUMS.txt.
• Add a distribution/winget/ manifest template + docs describing how to submit updates to microsoft/winget-pkgs (publishing remains manual/optional).
• Document these install options in README.md (clearly marked as optional/community distribution).

Risks

• Packaging metadata drifting from release assets; mitigate via an update script that pulls SHA256SUMS.txt for a tag.

Local test plan

pm ci

pm run lint

pm test

pm run build

pm run docs:check (if docs touched)

[Kinin-Code-Offical]

Done via #44
Merge commit: 3a142f6

Verification

• npm ci (PASS)
• npm run lint (PASS)
• npm test (PASS)
• npm run build (PASS)
• npm run docs:check (PASS)