feat: enhance PDF tools with new features and UI improvements

- Added 'Extract Attachments' and 'Edit Attachments' functionalities to manage embedded files in PDFs.
- Introduced new splitting options: by bookmarks and by a specified number of pages (N times).
- Updated the user interface to include new options and improved layout for better usability.
- Enhanced the GitHub link display with dynamic star count retrieval.
- Bumped version to 1.4.0 and updated footer to reflect the new version.
- Refactored existing code for better maintainability and added new TypeScript definitions for the new features.

src/js/config/pdf-tools.ts

@@ -6,7 +6,6 @@ export const singlePdfLoadTools = [
   'pdf-to-jpg',
   'pdf-to-png',
   'pdf-to-webp',
-  'compress',
   'pdf-to-greyscale',
   'edit-metadata',
   'remove-metadata',
@@ -38,6 +37,7 @@ export const singlePdfLoadTools = [
   'posterize',
   'remove-blank-pages',
   'add-attachments',
+  'edit-attachments',
   'sanitize-pdf',
   'remove-restrictions',
   'bookmark-pdf',
@@ -65,4 +65,7 @@ export const multiFileTools = [
   'alternate-merge',
   'linearize',
   'reverse-pages',
+  'txt-to-pdf',
+  'compress',
+  'extract-attachments',
 ];