🌐 Sync Translations + Update README Progress Table (#3359)

### 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>

README.md

@@ -141,7 +141,7 @@ Stirling-PDF currently supports 39 languages!
 | Persian (فارسی) (fa_IR)                      | ![88%](https://geps.dev/progress/88)   |
 | Polish (Polski) (pl_PL)                      | ![96%](https://geps.dev/progress/96)   |
 | Portuguese (Português) (pt_PT)               | ![91%](https://geps.dev/progress/91)   |
-| Portuguese Brazilian (Português) (pt_BR)     | ![94%](https://geps.dev/progress/94)   |
+| Portuguese Brazilian (Português) (pt_BR)     | ![98%](https://geps.dev/progress/98)   |
 | Romanian (Română) (ro_RO)                    | ![75%](https://geps.dev/progress/75)   |
 | Russian (Русский) (ru_RU)                    | ![94%](https://geps.dev/progress/94)   |
 | Serbian Latin alphabet (Srpski) (sr_LATN_RS) | ![60%](https://geps.dev/progress/60)   |