refactor: use index files for imports to simplify the export flow (#2870)

packages/core/src/helpers/index.ts

@@ -0,0 +1,33 @@
+export * from './combineTransactionSteps'
+export * from './defaultBlockAt'
+export * from './findChildren'
+export * from './findChildrenInRange'
+export * from './findParentNode'
+export * from './findParentNodeClosestToPos'
+export * from './generateHTML'
+export * from './generateJSON'
+export * from './generateText'
+export * from './getAttributes'
+export * from './getChangedRanges'
+export * from './getDebugJSON'
+export * from './getExtensionField'
+export * from './getHTMLFromFragment'
+export * from './getMarkAttributes'
+export * from './getMarkRange'
+export * from './getMarksBetween'
+export * from './getMarkType'
+export * from './getNodeAttributes'
+export * from './getNodeType'
+export * from './getSchema'
+export * from './getText'
+export * from './getTextBetween'
+export * from './getTextContentFromNodes'
+export * from './getTextSerializersFromSchema'
+export * from './isActive'
+export * from './isList'
+export * from './isMarkActive'
+export * from './isNodeActive'
+export * from './isNodeEmpty'
+export * from './isNodeSelection'
+export * from './isTextSelection'
+export * from './posToDOMRect'