Create a rest server instead of creating multiple database connections in our plugins

[axyiee]

Short description

A common issue between Minecraft developers on large scale projects, is that most of them create multiple database connections instead of reutilizing existing ones through a rest server or something similar. This may affect the overall performance and increase resources usage/demand unnecessarily.

The proposed solution

Create a rest server using the following technologies:

• Ktor: responsible for the rest server itself;
• Exposed: responsible for the database

The problems in this solution and how to solve them

If the Rest API address and its endpoints were discovered (which wouldn't be too difficult since the project itself is open-source), someone can API abuse to overload the network and affect user data. The proposed solution for this problem is automatically generate a JWT key required for all requests, and regenerate it every 15 minutes to avoid leakage.

[axyiee]

Moved to #28