[Darkside] Tailwind darkside file export (#3431)

* ✨ Added darkside export to tailwind package

* 🚚 Move darkside build-script to separate script

* 🐛 Avoid using darkside for website yet

@navikt/core/tailwind/package.json

@@ -7,15 +7,14 @@
     "tailwind",
     "design-tokens"
   ],
-  "main": "tailwind.config.js",
-  "types": "tailwind.config.d.ts",
   "license": "MIT",
   "files": [
     "tailwind.config.js",
     "tailwind.config.d.ts"
   ],
   "scripts": {
-    "build": "tsx ./src && tsx darkside.ts",
+    "build": "tsx ./src && yarn build:darkside",
+    "build:darkside": "tsx darkside.ts",
     "test": "vitest run",
     "test:watch": "vitest watch"
   },
@@ -36,5 +35,29 @@
   "publishConfig": {
     "access": "public",
     "provenance": true
+  },
+  "main": "tailwind.config.js",
+  "types": "tailwind.config.d.ts",
+  "exports": {
+    ".": {
+      "import": {
+        "types": "./tailwind.config.d.ts",
+        "default": "./tailwind.config.js"
+      },
+      "require": {
+        "types": "./tailwind.config.d.ts",
+        "default": "./tailwind.config.js"
+      }
+    },
+    "./darkside": {
+      "import": {
+        "types": "./tailwind.config.d.ts",
+        "default": "./tailwind.darkside.config.js"
+      },
+      "require": {
+        "types": "./tailwind.config.d.ts",
+        "default": "./tailwind.darkside.config.js"
+      }
+    }
   }
 }