feat(context): add SvelteKit web app with Svelte 5 runes

- Add 15 routes: dashboard, spaces, documents, editor, tokens, settings, auth, etc.
- Add 10 components: DocumentCard, DocumentEditor, AIToolbar, SpaceCard, BatchCreateModal, etc.
- Add 7 Svelte 5 rune stores: documents, spaces, tokens, auth, theme, navigation, user-settings
- Add i18n with DE + EN locales
- Add types for Document, Space, AI models, token economy
- Add SvelteKit config with node adapter (port 5192)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/context/apps/web/svelte.config.js

@@ -0,0 +1,15 @@
+import adapter from '@sveltejs/adapter-node';
+import { vitePreprocess } from '@sveltejs/vite-plugin-svelte';
+
+/** @type {import('@sveltejs/kit').Config} */
+const config = {
+	preprocess: vitePreprocess(),
+
+	kit: {
+		adapter: adapter({
+			out: 'build',
+		}),
+	},
+};
+
+export default config;