feat: adding of components

src/app/app.module.ts

src/app/components/admin/admin.component.html

src/app/components/admin/admin.component.scss

src/app/components/admin/admin.component.spec.ts

src/app/components/admin/admin.component.ts

src/app/components/buyer/buyer.component.html

src/app/components/buyer/buyer.component.scss

src/app/components/buyer/buyer.component.spec.ts

src/app/components/buyer/buyer.component.ts

src/app/components/order/order.component.html

src/app/components/order/order.component.scss

src/app/components/order/order.component.spec.ts

src/app/components/order/order.component.ts

src/app/components/orders/orders.component.html

src/app/components/orders/orders.component.scss

src/app/components/orders/orders.component.spec.ts

src/app/components/orders/orders.component.ts

src/app/components/product/product.component.html

src/app/components/product/product.component.scss

src/app/components/product/product.component.spec.ts