Squad CLI activation pin is behind the published release #1895

The Squad CLI version pinned for new-repo activation is behind the published npm release.

New-repo activation installs 0.12.0, so anything that shipped in 0.13.0 is missing from a cold start.

Fix

Update both literals in workflows/shared/squad.md to 0.13.0:

1. the Default is <version>. line in the header comment
2. the SQUAD_CLI_VERSION fallback literal in the activation env: block

test/squad-cli-pin.test.ts fails if those two disagree, so they cannot be updated by halves.

Do not copy the version from the CLI package manifest in this repo. That is the
next unreleased version and resolves to E404 on npm — the exact failure PR #1818 fixed.

Filed automatically by .github/workflows/squad-cli-pin-drift.yml (#1825).