refactor: move geschichte domain to lib/geschichte/

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/lib/geschichte/GeschichteEditor.svelte

@@ -5,7 +5,7 @@ import { Editor } from '@tiptap/core';
 import StarterKit from '@tiptap/starter-kit';
 import { m } from '$lib/paraglide/messages.js';
 import type { components } from '$lib/generated/api';
-import PersonMultiSelect from './PersonMultiSelect.svelte';
+import PersonMultiSelect from '$lib/components/PersonMultiSelect.svelte';
 import DocumentMultiSelect from '$lib/document/DocumentMultiSelect.svelte';
 
 type Geschichte = components['schemas']['Geschichte'];

frontend/src/routes/geschichten/[id]/edit/+page.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
 import { goto } from '$app/navigation';
 import { m } from '$lib/paraglide/messages.js';
-import GeschichteEditor from '$lib/components/GeschichteEditor.svelte';
+import GeschichteEditor from '$lib/geschichte/GeschichteEditor.svelte';
 import BackButton from '$lib/components/BackButton.svelte';
 import { getErrorMessage } from '$lib/errors';
 import type { PageData } from './$types';

frontend/src/routes/geschichten/new/+page.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
 import { goto } from '$app/navigation';
 import { m } from '$lib/paraglide/messages.js';
-import GeschichteEditor from '$lib/components/GeschichteEditor.svelte';
+import GeschichteEditor from '$lib/geschichte/GeschichteEditor.svelte';
 import BackButton from '$lib/components/BackButton.svelte';
 import { getErrorMessage } from '$lib/errors';
 import type { PageData } from './$types';

frontend/src/routes/persons/[id]/+page.svelte

@@ -7,7 +7,7 @@ import NameHistoryCard from './NameHistoryCard.svelte';
 import CoCorrespondentsList from './CoCorrespondentsList.svelte';
 import PersonDocumentList from './PersonDocumentList.svelte';
 import PersonRelationshipsCard from './PersonRelationshipsCard.svelte';
-import GeschichtenCard from '$lib/components/GeschichtenCard.svelte';
+import GeschichtenCard from '$lib/geschichte/GeschichtenCard.svelte';
 
 let { data } = $props();