feat(error-tracking): add GlitchTip integration to all 15 remaining backends

- Create instrument.ts for: chat, clock, context, manadeck, mukke,
  nutriphi, photos, picture, planta, presi, questions, skilltree,
  storage, traces, zitare
- Add import './instrument' as first line in all main.ts files
- Add @manacore/shared-error-tracking dependency to all package.json files
- Create 10 new GlitchTip projects (mukke→18, total: 18 projects)
- All 18 backends now have error tracking (active when GLITCHTIP_DSN is set)

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

apps/skilltree/apps/backend/src/instrument.ts

@@ -0,0 +1,8 @@
+import { initErrorTracking } from '@manacore/shared-error-tracking';
+
+initErrorTracking({
+	serviceName: 'skilltree-backend',
+	environment: process.env.NODE_ENV,
+	release: process.env.APP_VERSION,
+	debug: process.env.NODE_ENV === 'development',
+});