export IPropertiesOptions for use by other libraries or code using docx library (#2979)

* export IPropertiesOptions for use by other libraries or code using docx library

* fixes #2978: export OutputTypes

* Export file in main index file

* Move type export to inside

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Co-authored-by: Dolan Miu <dolan_miu@hotmail.com>

src/file/index.ts

@@ -21,3 +21,4 @@ export * from "./vertical-align";
 export * from "./checkbox";
 export * from "./fonts";
 export * from "./textbox";
+export { type IPropertiesOptions } from "./core-properties";

src/util/index.ts

@@ -1,2 +1,3 @@
 export * from "./convenience-functions";
 export * from "./values";
+export type * from "./output-type";