feat: add customName property to SingleShow and update display logic in cast and orchester pages

Author: mayfinn

src/lib/ShowData.d.ts

@@ -20,6 +20,7 @@ type SingleShow = {
 	isPublic: boolean;
 	timestamp: string;
 	ticketUrl: string;
+  customName?: string;
 	companies: string[];
 	cast: {
 		ensemble: string[];

src/routes/[musical]/(heroimage)/cast/+page.svelte

@@ -95,10 +95,16 @@
 			})} Uhr
 		</span>
 
-		{#if show?.isPublic === false}
-			<br />
-			Nicht öffentliche Veranstaltung
-		{/if}
+    {#if show.isPublic === false || show.customName}
+      <br />
+      <span class="c-fg-3">
+      {#if show.isPublic === false}
+      Nicht öffentliche Veranstaltung{#if show.customName}: {show.customName}{/if}
+      {:else}
+      {show.customName}
+      {/if}
+      </span>
+    {/if}
 	</p>
 
 	{#if show.cast.roles.length > 0}

src/routes/[musical]/(heroimage)/orchester/+page.svelte

@@ -95,10 +95,16 @@
 			})} Uhr
 		</span>
 
-		{#if show?.isPublic === false}
-			<br />
-			Nicht öffentliche Veranstaltung
-		{/if}
+		{#if show.isPublic === false || show.customName}
+      <br />
+      <span class="c-fg-3">
+      {#if show.isPublic === false}
+      Nicht öffentliche Veranstaltung{#if show.customName}: {show.customName}{/if}
+      {:else}
+      {show.customName}
+      {/if}
+      </span>
+    {/if}
 	</p>
 
 	<h2>Orchester</h2>