shared-hono depends on @mana/shared-logger; without it, the bun runtime
crashes on first import with ENOENT for the workspace symlink target.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Switches the build context to repo-root so the pnpm-workspace install
can pull in @mana/shared-hono. Mirrors the mana-auth/mana-ai pattern
(node+pnpm installer stage → bun runtime stage).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>