feat(stark-ui): date-picker - add support for ControlValueAccessor an…

…d Validator

ISSUES CLOSED: #1146

BREAKING CHANGE: stark-date-picker now integrates ControlValueAccessor and Validator:

  - The following Input have been changed:
      - **date** is now **value**
      - **isDisabled** is now **disabled**
  - The output **dateChanged** is now **dateChange**
  - **dateInput** Output has been added and now the date-picker Input/Output are
    similar to the ones of MatDatepicker component

packages/stark-ui/src/modules/date-picker/components/date-picker.component.html

@@ -1,17 +1,24 @@
 <mat-form-field [id]="pickerId">
 	<input
 		matInput
-		[disabled]="isDisabled"
 		[id]="pickerId + '-input'"
 		[matDatepicker]="picker"
+		(dateInput)="onDateInput($event)"
+		(dateChange)="onDateChange($event)"
 		[placeholder]="label | translate"
 		[matDatepickerFilter]="dateFilterFnWrapper"
 		[min]="minDate"
 		[max]="maxDate"
 		[name]="pickerName"
-		[value]="date"
-		(dateChange)="onDateChange($event)"
+		[required]="required"
+		[formControl]="formControl"
 	/>
 	<mat-datepicker-toggle matSuffix [for]="picker"></mat-datepicker-toggle>
 	<mat-datepicker [id]="pickerId" #picker></mat-datepicker>
+
+	<mat-error>
+		<div>
+			<ng-content></ng-content>
+		</div>
+	</mat-error>
 </mat-form-field>