Previously, config dependencies could only be installed via `pnpm add --config`.
If a user manually added config deps to pnpm-workspace.yaml or deleted
pnpm-lock.env.yaml, `pnpm install` would fail because the resolution step
(fetching integrity from the registry) was missing.
Add `resolveAndInstallConfigDeps` which checks the env lockfile for missing
entries and resolves them from the npm registry before installing. This enables
two new workflows:
1. Manually adding config deps to pnpm-workspace.yaml
2. Deleting pnpm-lock.env.yaml and having `pnpm install` recreate it