Issue with middlewares

[destyk]

Issue:

Found an issue with middlewares: regular middlewares doesn't fire when the user moves through scenes.

Solution:

Add a UseStage decorator that will work similar to the Use decorator, but instead of using this.bot.use(), use this.stage.use(). Such middlewares work regardless of whether the user is in the scene or not

[destyk]

The problem is currently solved like this:

@Update()
export class Middleware implements OnModuleInit {
    constructor(
        @Inject(TELEGRAF_STAGE)
        private readonly stage: Scenes.Stage<any>,
    ) {}

    public onModuleInit(): void {
        this.stage.use((ctx: SceneContext, next: () => Promise<void>) => {
            // something...
            return next();
        });
    }
}