Refactor: Move contact service into services folder

libs/contact/src/index.ts

@@ -1,4 +1,4 @@
 export * from './lib/contact-model';
-export * from './lib/contact.service';
+export * from './lib/services/contact.service';
 export * from './lib/services/contact-form.service';
 export * from './lib/contact.module';

libs/contact/src/lib/contact.module.ts

@@ -1,6 +1,6 @@
 import { NgModule, Optional, SkipSelf } from '@angular/core';
 import { CommonModule } from '@angular/common';
-import { ContactService } from './contact.service';
+import { ContactService } from './services/contact.service';
 import { ContactFormService } from './services/contact-form.service';
 
 @NgModule({

libs/contact/src/lib/services/contact.service.spec.ts

@@ -1,4 +1,4 @@
-import { Contact } from './contact-model';
+import { Contact } from '../contact-model';
 import { TestBed, async } from '@angular/core/testing';
 
 import { ContactService } from './contact.service';

libs/contact/src/lib/services/contact.service.ts

@@ -1,6 +1,6 @@
 import { Injectable } from '@angular/core';
 
-import { Contact } from './contact-model';
+import { Contact } from '../contact-model';
 import { Observable, of } from 'rxjs';
 
 const contact: Contact = {