[IMPROVEMENT] Improve types within routes

[vedovelli]

Problem

When using useLoaderData() hook, we are not receiving strongly typed objects.

Solution

This PR introduces a new type LoaderData which is used in 2 different places within routes:

• To type the return of the loader function. Plus, we are now using Remix's utility json() to generate a JSON Response;
• To type the return of the hook useLoaderData().

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[willianjusten]

Hey! Glad to see you here =) That was something that I pointed on #14 that I wanted to address, thanks for fixing it!

[adeonir]

Thanks @vedovelli, very good!

[vedovelli]

🚀