make ready for rspack

[utnapischtim]

• context: make the bundle current_app unaware
• pnpm: add override for pnpm
• project: remove current_app usage

[utnapischtim]

the change to use app instead of current_app was made to use the classes in invenio-cli directly. The approach of using the classes directly had a massive drawback (invenio-cli was not usable if installed globally). so invenio-cli has been changed. a new approach has been implemented here which doesn't need the app in the classes any more. this means that only this particular commit is really necessary.

it could be that the whole change of this PR could be helpful in the future but it isn't necessary at the moment!

even further thought: we could move that functionality to pywebpack. here. it wouldn't be possible to use current_app in pywebpack but we could read the variable from os.environ and that could be also set in invenio-cli or on a docker image build as environment variable.

if those reverts will be done, the reverts described here in invenio-assets have to be applied too.

[utnapischtim]

superseded by #27