Migrate javalabView to redux-toolkit - #51155

Migrate Java Lab view redux store to redux-toolkit format. No functionality change here.

As part of this, I updated setDisplayTheme to be a thunk instead of a reducer with a side effect (which is an anti-pattern). I ended up going with a basic thunk here since we weren't doing any management of a failed request here, just storing the new theme in redux and doing a best effort to update the theme in User Preferences. If we wanted to do something more complex, such as show an error if the request failed, createAsyncThunk may be helpful. I looked into RTK query, but it seemed like overkill for our current setup, and is a bit of a paradigm shift for thinking about redux. It may be something to revisit if we want to update our APIs.

Links

• jira ticket: SL-724

Testing story

Tested locally that updating the state still works as expected.

Follow-up work

Migrate the other parts of the Java Lab redux store to redux toolkit.

PR Checklist:

• Tests provide adequate coverage
• Privacy and Security impacts have been assessed
• Code is well-commented
• New features are translatable or updates will not break translations
• Relevant documentation has been added or updated
• User impact is well-understood and desirable
• Pull Request is labeled appropriately
• Follow-up work items (including potential tech debt) are tracked and linked