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

ts/classes.pdfservice.ts

@@ -1,6 +1,5 @@
 import * as plugins from './plugins.js';
 import * as helpers from './helpers.js';
-import type { IDocumentSettings} from '../ts/interfaces/index.js';
 
 export interface IPdfServiceConstructorOptions {
 
@@ -46,7 +45,7 @@ export class PdfService {
    */
   public async createPdfFromLetterObject(optionsArg: {
     letterData: plugins.tsclass.business.ILetter,
-    documentSettings: IDocumentSettings
+    documentSettings: plugins.shared.interfaces.IDocumentSettings
   }) {
     const html = `
       <script type="module">