Await php.ini writes during boot

[mho22]

bootRequestHandler() called setPhpIniEntries() without awaiting it. That function awaits php.readFileAsText() before writing, so it returns at the await point and the write to php.ini lands in a later microtask.

applyLegacyPhpIniOverrides() ran next and merged the legacy network-disable list into the same file. On legacy PHP it could read php.ini before the phpIniEntries write had landed, and the late write then overwrote disable_functions, allow_url_fopen, and date.timezone. applyLegacyPhpIniOverrides() had the same defect internally: it called setPhpIniEntries() without awaiting and returned void.

What this changes

createPhp() in boot.ts awaits both setPhpIniEntries() and applyLegacyPhpIniOverrides(). applyLegacyPhpIniOverrides() becomes async, returns Promise<void>, and awaits its own write.

This is not a breaking change. applyLegacyPhpIniOverrides() is not re-exported from @wp-playground/wordpress and bootRequestHandler() is its only caller.

Testing

• npx nx test playground-wordpress — 136 passed.
• npx nx run playground-cli:test-playground-cli --testFiles=run-cli.spec.ts — 97 passed.