Improve import alias

@file/ and @export/ instead of file/ and export/ etc

src/file/table/table-properties/table-float-properties.spec.ts

@@ -1,6 +1,6 @@
 import { expect } from "chai";
 
-import { Formatter } from "export/formatter";
+import { Formatter } from "@export/formatter";
 
 import { RelativeHorizontalPosition, RelativeVerticalPosition, TableAnchorType, TableFloatProperties } from "./table-float-properties";
 import { OverlapType } from "./table-overlap";