refactor(frontend): 🔥 rewrite backup UI for new page base components

Removed old split code and used the composition api to to re-write the import/export functionality of mealie.

.vscode/settings.json

@@ -8,6 +8,7 @@
   "python.testing.pytestEnabled": true,
   "python.testing.autoTestDiscoverOnSaveEnabled": false,
   "python.testing.pytestArgs": ["tests"],
+  "python.linting.flake8Enabled": true,
   "cSpell.enableFiletypes": ["!javascript", "!python", "!yaml"],
   "i18n-ally.localesPaths": "frontend/lang/messages",
   "i18n-ally.sourceLanguage": "en-US",
@@ -15,7 +16,6 @@
   "i18n-ally.keystyle": "nested",
   "cSpell.words": ["compression", "hkotel", "performant", "postgres", "webp"],
   "search.mode": "reuseEditor",
-  "python.linting.flake8Enabled": true,
   "conventionalCommits.scopes": ["frontend", "docs", "backend"],
   "editor.formatOnSave": true,
   "eslint.workingDirectories": ["./frontend"],