JSON Placeholder API Implementation

[bbatsche]

This PR will pull post and user profile data from JSON Placeholder API, store it in a database locally, and then display the results on a single page. Some key design decisions I would like to highlight are:

• Using DDEV to manage the development environment. I learned about DDEV recently and wanted to experiment with it. I also felt that it would help get the project up and running more quickly, without having to manually manage containers & Docker compose files.
• Using Spatie Laravel Data as DTO & value objects throughout the project. I wanted to ensure consistent, strongly typed data was passed throughout the project and Laravel Data provided this very well.
• Laravel Pint, Larastan, and Pest for consistent code style and quality. I focused my testing on key pieces of logic and did not create tests just for the sake of coverage.
• A single page frontend built on Vue. While the app currently only shows a list of one entity type, there are already hooks for showing more in the future.