feat: register font/dfont converters in the app and worker

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app.js

@@ -10,6 +10,8 @@ import { registerImageToPdfConverter } from './converters/imageToPdf.js';
 import { registerDocumentConverters } from './converters/document.js';
 import { registerIcoConverter } from './converters/ico.js';
 import { registerHeicConverter } from './converters/heic.js';
+import { registerFontConverter } from './converters/font.js';
+import { registerDfontConverter } from './converters/dfont.js';
 import { resolveInputFormat } from './mime.js';
 import { deleteIfExists } from './storage.js';
 import { createJob, getJobByUuid } from './jobs/jobRepository.js';
@@ -40,6 +42,8 @@ function registerAllConverters() {
   registerDocumentConverters();
   registerIcoConverter();
   registerHeicConverter();
+  registerFontConverter();
+  registerDfontConverter();
   convertersRegistered = true;
 }