Schedule component (still no logic)

Introduces new components for movie rating, duration, category, and empty schedule states. Updates the schedule view to use Angular Material tabs for date selection, dynamically showing movie info or an empty state. Also refines layout and styling for movie details and poster display.

src/app/movie-schedule-empty/movie-schedule-empty.component.html

@@ -0,0 +1,5 @@
+<div class="flex flex-col items-center justify-center py-12 text-gray-500 h-100 m-auto">
+  <mat-icon class="text-6xl mb-4 opacity-50" style="font-size: 50px; width: 50px; height: 50px;">event_busy</mat-icon>
+  <p class="text-lg">Keine Vorstellungen verfügbar</p>
+  <p class="text-sm">An diesem Tag finden keine Filmvorführungen statt.</p>
+</div>

src/app/movie-schedule-empty/movie-schedule-empty.component.ts

@@ -0,0 +1,11 @@
+import { Component } from '@angular/core';
+
+@Component({
+  selector: 'app-movie-schedule-empty',
+  standalone: false,
+  templateUrl: './movie-schedule-empty.component.html',
+  styleUrl: './movie-schedule-empty.component.css'
+})
+export class MovieScheduleEmptyComponent {
+
+}