feat(loading screen): add angular wrapper

src/app/components/scan-loading-screen/scan-loading-screen.html

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+<scan-loading-screen></scan-loading-screen>

src/app/components/scan-loading-screen/scan-loading-screen.scss

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+:host {
+  display: flex;
+  height: 100%;
+  position: absolute;
+  width: 100%;
+}

src/app/components/scan-loading-screen/scan-loading-screen.spec.ts

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+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ScanLoadingScreen } from './scan-loading-screen';
+
+describe('ScanLoadingScreen', () => {
+  let component: ScanLoadingScreen;
+  let fixture: ComponentFixture<ScanLoadingScreen>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [ScanLoadingScreen]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(ScanLoadingScreen);
+    component = fixture.componentInstance;
+    await fixture.whenStable();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/components/scan-loading-screen/scan-loading-screen.ts

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+import { Component, CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';
+
+@Component({
+  selector: 'app-scan-loading-screen',
+  imports: [],
+  templateUrl: './scan-loading-screen.html',
+  styleUrl: './scan-loading-screen.scss',
+  schemas: [CUSTOM_ELEMENTS_SCHEMA]
+})
+export class ScanLoadingScreen {
+
+}