refactor: rename nutriphi module to food (Essen)

Complete rename across the entire monorepo pre-launch:
- Module, routes, API, i18n, standalone landing app directories
- All code identifiers, display names, logo component
- German user-facing label: "Essen" (English brand stays "Food")
- Dexie table nutriFavorites -> foodFavorites
- Infra configs (docker-compose, cloudflared, nginx, wrangler)

Zero residue of nutriphi remains. No data migration needed (pre-launch).

Follow-up: run pnpm install, update Cloudflare DNS
(food.mana.how), rename Cloudflare Pages project.

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

apps/nutriphi/packages/shared/package.json

@@ -1,23 +0,0 @@
-{
-	"name": "@nutriphi/shared",
-	"version": "0.2.0",
-	"type": "commonjs",
-	"main": "./src/index.ts",
-	"types": "./src/index.ts",
-	"exports": {
-		".": "./src/index.ts",
-		"./types": "./src/types/index.ts",
-		"./utils": "./src/utils/index.ts",
-		"./constants": "./src/constants/index.ts"
-	},
-	"scripts": {
-		"type-check": "tsc --noEmit",
-		"test": "vitest run",
-		"test:watch": "vitest"
-	},
-	"devDependencies": {
-		"typescript": "~5.9.2",
-		"vitest": "^4.1.2"
-	},
-	"dependencies": {}
-}