feat(register): add register page with routing and form implementation

src/app/shared/components/button/button.component.spec.ts

@@ -0,0 +1,19 @@
+import { TestBed } from '@angular/core/testing';
+
+import { ButtonComponent } from './button.component';
+
+describe('ButtonComponent', () => {
+  it('applies the borderless variant class', async () => {
+    await TestBed.configureTestingModule({
+      imports: [ButtonComponent]
+    }).compileComponents();
+
+    const fixture = TestBed.createComponent(ButtonComponent);
+    fixture.componentRef.setInput('variant', 'borderless');
+    fixture.detectChanges();
+
+    const button = fixture.nativeElement.querySelector('button') as HTMLButtonElement;
+
+    expect(button.classList.contains('btn-borderless')).toBe(true);
+  });
+});