Mise à jour vers Angular 15

refs #622

Closes #659 (closed)

src/app/directives/flex-xxs.directive.ts

 import { Directive, Input } from "@angular/core";
-import { BREAKPOINT, ShowHideDirective } from "@angular/flex-layout";
+import { BREAKPOINT, ShowHideDirective } from "@ngbracket/ngx-layout";
 
 const XXS_BREAKPOINTS = [
     {