Run `format` before `format:check` in `fedify init`'s hydration test validation

[Palcimer]

When running mise run test:init for fedify init, the hydration test only runs format:check (and lint) without running format first. When the package manager is npm or pnpm, format:check fails, which causes the entire test suite to fail.

Proposed Fix

Run format (auto-fix) before format:check in the hydration test validation, so that freshly scaffolded projects are already compliant with the formatter before being checked.