Added angular v18 service import example

[karnavpargi]

Added angular v18 service import example

 import { Component, inject } from '@angular/core'; import { MyService } from './my-service'; @Component({ selector: 'my-component', template: '<div>Parameter decorator</div>' }) export class MyComponent { myService: MyService = inject(MyService); constructor() { console.log(myService); // MyService } } ```

[sudheerj]

@karnavpargi Thanks for PR