refactor: clean up recipe routes and reduce bundle size

- Eliminate duplicate API fetch in recipe page by passing item from
  server load to universal load instead of fetching twice
- Replace cheerio with simple regex in stripHtmlTags, removing ~200KB
  dependency
- Refactor multiplier buttons in IngredientsPage to use loop instead
  of 5 repeated form elements
- Move /rezepte/untranslated to /[recipeLang]/admin/untranslated and
  delete legacy /rezepte/ layout files

package.json

@@ -44,7 +44,6 @@
 		"@auth/sveltekit": "^1.11.1",
 		"@sveltejs/adapter-node": "^5.0.0",
 		"chart.js": "^4.5.0",
-		"cheerio": "1.0.0-rc.12",
 		"file-type": "^19.0.0",
 		"ioredis": "^5.9.0",
 		"mongoose": "^8.0.0",