feat(core): Refactor project structure for better modularity and code organization

ts_shared/interfaces/document.ts

@@ -0,0 +1,8 @@
+import * as translation from '../translation.js';
+
+export interface IDocumentSettings {
+  enableTopDraftText?: boolean;
+  enableDefaultHeader?: boolean;
+  enableDefaultFooter?: boolean;
+  languageCode?: translation.TLanguageCode;
+}