Feat/embedded fonts (#2174)

* #239 Embedded fonts

* Add boilerplate for font table

* Fix linting

* Fix linting

* Fix odttf naming

* Correct writing of fonts to relationships and font table

new uuid function

* Add font to run

* Add demo

Fix tests

* Add character set support

* Add tests

* Write tests

src/file/index.ts

@@ -18,3 +18,4 @@ export * from "./shared";
 export * from "./border";
 export * from "./vertical-align";
 export * from "./checkbox";
+export * from "./fonts";