Move MountDevice type declaration to @wp-playground/storage

[zaerl]

Motivation for the change, related issues

@wp-playground/storage depends on @php-wasm/web because of a single MountDevice type import in packages/playground/storage/src/lib/browser-fs.ts.

Implementation details

MountDevice type export is moved to @wp-playground/storage. @php-wasm/web continue exporting it for backwards compatibility.

Testing Instructions (or ideally a Blueprint)

Passing tests is enough.

[Copilot]

Pull request overview

Moves the MountDevice type definition into @wp-playground/storage to remove an unnecessary dependency on @php-wasm/web, while keeping a deprecated MountDevice export in @php-wasm/web for compatibility.

Changes:

• Update imports across packages to source MountDevice from @wp-playground/storage.
• Define and export MountDevice in @wp-playground/storage (in browser-fs.ts).
• Deprecate MountDevice in @php-wasm/web by aliasing it to the storage type.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
packages/playground/website/src/lib/state/redux/slice-clients.ts	Switch MountDevice import to @wp-playground/storage.
packages/playground/storage/src/lib/browser-fs.ts	Introduce exported MountDevice type in storage.
packages/playground/remote/src/lib/playground-worker-endpoint.ts	Switch MountDevice import to @wp-playground/storage.
packages/playground/personal-wp/src/lib/state/redux/slice-clients.ts	Switch MountDevice import to @wp-playground/storage.
packages/php-wasm/web/src/lib/directory-handle-mount.ts	Deprecate MountDevice export by aliasing storage’s type.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[brandonpayton]

Thank you, @zaerl!