feat(frontend): replace lazy loading with zibll lazysizes

.gitignore

@@ -16,6 +16,7 @@
 !/tests/widget-system/
 /tests/widget-system/*
 !/tests/widget-system/post-visual-contract.test.cjs
+!/tests/widget-system/lazyload-contract.test.cjs
 !/tests/visual/docker-compose.zibll.yml
 !/tests/visual/zibll-Caddyfile
 !/tests/visual/README.md