Chore: ditch the abandoned ngx-bootstrap-icons, roll our own (#14665)

src-ui/src/app/app.component.spec.ts

@@ -3,7 +3,6 @@ import { provideHttpClientTesting } from '@angular/common/http/testing'
 import { ComponentFixture, TestBed } from '@angular/core/testing'
 import { Router, RouterModule } from '@angular/router'
 import { NgbModalModule } from '@ng-bootstrap/ng-bootstrap'
-import { allIcons, NgxBootstrapIconsModule } from 'ngx-bootstrap-icons'
 import {
   provideUiTour,
   TourNgBootstrap,
@@ -47,7 +46,6 @@ describe('AppComponent', () => {
         ToastsComponent,
         FileDropComponent,
         TourNgBootstrap,
-        NgxBootstrapIconsModule.pick(allIcons),
       ],
       providers: [
         PermissionsGuard,