feat: export getCartesianDimensionInfo and getPolarDimensionInfo, fix #3668

Author: xile611

packages/vchart/src/event/index.ts

@@ -1,2 +1,4 @@
 export * from './event';
 export * from './events';
+
+export { getCartesianDimensionInfo, getPolarDimensionInfo } from './events/dimension/util';