feat(a11y): Set starting focus to progress bar in orientation

Related to #597 (closed)

Dependent of !884 (merged)

What does this MR do and why?

Ajouté un focusTrap pour ce cas particulier, ça + !884 (merged) (qui permet de s'en sortir), ça me paraît pas mal

À chaque validation d’étape, il faut revoir la position du focus pour la navigation au clavier. On se retrouve à chaque fois au niveau des onglets du navigateur (on doit parcourir l’url, la barre des favoris personnel, etc..). Il faut par exemple mettre le focus au niveau de la barre de progression qui va annoncer « Progression dans ce formulaire : 29% ».

src/app/form/orientation-form-view/global-components/navigation/navigation.component.ts

 import { Component, EventEmitter, Input, Output, ViewChild } from '@angular/core';
-import { ActivatedRoute, Router } from '@angular/router';
+import { Router } from '@angular/router';
 import { ButtonComponent } from '../../../../shared/components';
 import { NeedsType, OnlineDemarche } from '../../enums/orientation.enums';
 import { MediationStepType, MediationType } from '../../types/orientation.types';
@@ -19,18 +19,16 @@ export class NavigationComponent {
   @Input() hideNavButtons = false;
   @Input() failedOrientation = false;
 
-  @Output() goNext = new EventEmitter<any>();
-  @Output() goPrev = new EventEmitter<any>();
-  @Output() goReset = new EventEmitter<any>();
+  @Output() goNext = new EventEmitter<boolean>();
+  @Output() goPrev = new EventEmitter<void>();
+  @Output() goReset = new EventEmitter<void>();
 
   @ViewChild('prevButton', { read: ButtonComponent }) prevButton: ButtonComponent;
   @ViewChild('nextButton', { read: ButtonComponent }) nextButton: ButtonComponent;
 
   public NeedsTypeEnum = NeedsType;
-  constructor(
-    private router: Router,
-    private route: ActivatedRoute,
-  ) {}
+
+  constructor(private router: Router) {}
 
   public showPrevButton(): boolean {
     return this.currentStep !== null && !(this.isPrevHidden || this.isLastStep);
@@ -38,20 +36,23 @@ export class NavigationComponent {
   public showNextButton(): boolean {
     return !this.hideNavButtons;
   }
+
   public nextPage(isPrint?: boolean): void {
     this.goNext.emit(isPrint);
   }
-
   public prevPage(): void {
     this.goPrev.emit();
   }
+
   public goCarto(): void {
     this.goReset.emit();
     this.router.navigateByUrl('/acteurs');
   }
+
   public resetOrientation(): void {
     this.goReset.emit();
   }
+
   public focusFirstButton(): void {
     if (this.showPrevButton()) {
       this.prevButton.focus();