chore: добавить SLM-каркас admin

- добавлен app entrypoint, main layout и dashboard screen\n- настроены алиасы SLM-слоёв и PostCSS для CSS Modules\n- перенесены глобальные стили в shared/styles

apps/admin/tsconfig.app.json

@@ -16,7 +16,18 @@
     "resolveJsonModule": true,
     "isolatedModules": true,
     "noEmit": true,
-    "jsx": "react-jsx"
+    "jsx": "react-jsx",
+    "baseUrl": ".",
+    "paths": {
+      "app/*": ["src/app/*"],
+      "layouts/*": ["src/layouts/*"],
+      "screens/*": ["src/screens/*"],
+      "widgets/*": ["src/widgets/*"],
+      "business/*": ["src/business/*"],
+      "infra/*": ["src/infra/*"],
+      "ui/*": ["src/ui/*"],
+      "shared/*": ["src/shared/*"]
+    }
   },
   "include": ["src"]
 }