feat: implement rules engine and management panel for custom holiday optimization

src/app/components/user-input/user-input.html

@@ -24,6 +24,7 @@
 		</button>
 		<app-calendar-settings></app-calendar-settings>
 	</div>
+	<app-rules-panel></app-rules-panel>
 	@if (hasRemainingDays()) {
 		<mat-card class="mat-elevation-z2 warning-card">
 			<mat-card-content class="warning-content">