feat: add routing for componentes-test and create reusable button component

- Implemented lazy loading for the componentes-test feature module.
- Created a redirect route to componentes-test as the default path.
- Added a new ReutilizablesTestPageComponent to showcase reusable components.
- Developed a reusable ButtonComponent with various styles and states.
- Updated global styles to include Bootstrap.
- Added SCSS styles for the new components and pages.

src/app/app.spec.ts

@@ -18,6 +18,6 @@ describe('App', () => {
     const fixture = TestBed.createComponent(App);
     await fixture.whenStable();
     const compiled = fixture.nativeElement as HTMLElement;
-    expect(compiled.querySelector('h1')?.textContent).toContain('Hello, shopit-front');
+    expect(compiled.querySelector('router-outlet')).not.toBeNull();
   });
 });