feat: add appendChildrenRoutesFirst configuration option

[EinfachHans]

Information

Type	Breaking change
Feature	No

closes #2706

---

Description

As described in the original issue the children routes should be appended before the controller routes itself. This PR adds a opt-in solution via a configuration setting. As discussed we should follow the following:

• In next major release (8.0.0): Set the default of this value to true & deprecate the option
• In the next major version after that (9.0.0): Remove the option

Usage example

import {Configuration} from "@tsed/di";

@Configuration({
  appendChildrenRoutesFirst: true
})
export class Server {}

Todos

• Tests
• Coverage
• Example
• Documentation

[Romakita]

@EinfachHans Perfect ;)

[Romakita]

🎉 This PR is included in version 7.70.0 🎉

The release is available on:

• v7.70.0
• GitHub release

Your semantic-release bot 📦🚀