🌐 Sync Translations + Update README Progress Table (#2982)

### Description of Changes

This Pull Request was automatically generated to synchronize updates to
translation files and documentation. Below are the details of the
changes made:

#### **1. Synchronization of Translation Files**
- Updated translation files (`messages_*.properties`) to reflect changes
in the reference file `messages_en_GB.properties`.
- Ensured consistency and synchronization across all supported language
files.
- Highlighted any missing or incomplete translations.

#### **2. Update README.md**
- Generated the translation progress table in `README.md`.
- Added a summary of the current translation status for all supported
languages.
- Included up-to-date statistics on translation coverage.

#### **Why these changes are necessary**
- Keeps translation files aligned with the latest reference updates.
- Ensures the documentation reflects the current translation progress.

---

Auto-generated by [create-pull-request][1].

[1]: https://github.com/peter-evans/create-pull-request

---------

Co-authored-by: stirlingbot[bot] <195170888+stirlingbot[bot]@users.noreply.github.com>

src/main/resources/messages_ca_CA.properties

@@ -992,6 +992,7 @@ pdfOrganiser.mode.7=Eliminar Primer
 pdfOrganiser.mode.8=Eliminar Últim
 pdfOrganiser.mode.9=Eliminar Primer i Últim
 pdfOrganiser.mode.10=Fusionar Parells-Senars
+pdfOrganiser.mode.11=Duplicate all pages
 pdfOrganiser.placeholder=(p. ex. 1,3,2 o 4-8,2,10-12 o 2n-1)