feat: ecosistema FRASA — apps Cotizador, Alta Clientes, Cobranza y Landing

- Cotizador (/quote): 4 propuestas con formulas validadas del Excel, comparador,
  combobox de unidades, vigencia, PDF ANEXO A
- Alta Clientes (/client): wizard 8 pasos, validacion CURP RENAPO, OCR de INE,
  checklist de expediente, firma digital, 5 PDFs legales
- Cobranza (/pay): planes de enganche, mora, vista cobranza del dia, recibos PDF,
  bitacora, dashboard con filtros
- Landing (/): entrada al ecosistema
- Design system StudioBlank (monocromo, acento #1B4332) en las 4 apps
- 123 tests vitest

apps/landing/package.json

@@ -0,0 +1,29 @@
+{
+  "name": "landing",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "test": "vitest run",
+    "test:coverage": "vitest run --coverage",
+    "preview": "vite preview --port 3004"
+  },
+  "dependencies": {
+    "@fontsource/inter": "^5.3.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0"
+  },
+  "devDependencies": {
+    "@tailwindcss/vite": "^4.0.0",
+    "@types/react": "^19.0.2",
+    "@types/react-dom": "^19.0.2",
+    "@vitejs/plugin-react": "^4.3.4",
+    "@vitest/coverage-v8": "^2.1.8",
+    "tailwindcss": "^4.0.0",
+    "typescript": "~5.6.3",
+    "vite": "^6.0.7",
+    "vitest": "^2.1.8"
+  }
+}