dropdownsearch for dyanmic fields

   I’ve enabled searchable dropdowns for all dynamic dropdown controls in Assignment Details.

What I changed

• Added a dropdownSearch map in assignment-details.component.ts.
• Added ngx-mat-select-search inside every dynamic dropdown in assignment-details.component.html.
•    <ng-template #dynamicOptions>
•       <mat-option>
•         <ngx-mat-select-search
•           [(ngModel)]="dropdownSearch[field.ControlName]"
•           [ngModelOptions]="{ standalone: true }"
•           [placeholderLabel]="'Search...'"
•           [noEntriesFoundLabel]="'Not found'"
•         ></ngx-mat-select-search>
•       </mat-option>
•       <mat-option
•         *ngFor="
•           let option of field.Options
•             | stringFilterBy: dropdownSearch[field.ControlName]:'Name'
•         "
•         [value]="option.Value"
•       >
•         {{ option.Name }}
•       </mat-option>
•     </ng-template>
• Wired filtering using the existing stringFilterBy pipe on option.Name.
  

private destroy$ = new Subject<void>();

dropdownSearch: Record<string, string> = {};