feat: Implement the `LearningOrderDataLoader`

[apomalyn]

As a developer, I want to update the learning order system collections at the start of the application

Requirements

Implement a LearningOrderDataLoader that will update the local learning order system tables

What needs to be done

Implement a LearningOrderDataLoader under src/core/dataloaders, it should:

• retrieve the latest version
• call the API /learning/stages
• update the database

Dependencies

Child of #218

Depends on:

• 224

• https://github.com/RoadTripMoustache/kana_to_kanji_api/issues/77