[Feature]: Implement Value annotation

[jlenon7]

🚀 Feature Proposal

Implement the @Value annotation to be used as a property decorator.

Motivation

This annotation will be responsible to automatically inject some configuration in some property of the class. Also, if the configuration value does not exist, an exception needs to be thrown.

Example

import { Value } from '@athenna/config'

export class AppService {
  @Value('app.name')
  private name: string

  @Value('app.environment')
  private environment: string

  @Value('logging.channels')
  private channels: Record<string, any>
}