Add pivot utils top-level and add layerchart/utils for all utils

Author: techniq

packages/layerchart/package.json

@@ -106,6 +106,10 @@
     ".": {
       "types": "./dist/index.d.ts",
       "svelte": "./dist/index.js"
+    },
+    "./utils/*": {
+      "types": "./dist/utils/*.d.ts",
+      "svelte": "./dist/utils/*.js"
     }
   },
   "files": [

packages/layerchart/src/lib/utils/index.ts

@@ -2,5 +2,6 @@ export * from './geo';
 export * from './graph';
 export * from './hierarchy';
 export * from './math';
+export * from './pivot';
 export * from './stack';
 export * from './ticks';