fix(npm): export types for ESM (#52)

Author: tuhana

package.json

@@ -7,7 +7,8 @@
   "exports": {
     ".": {
       "require": "./dist/index.cjs",
-      "import": "./dist/index.mjs"
+      "import": "./dist/index.mjs",
+      "types": "./index.d.ts"
     },
     "./style": "./css/catppuccin.css",
     "./scss/*": "./scss/*",