🌐 Sync Translations + Update README Progress Table (#3600)

### 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_el_GR.properties

@@ -3,6 +3,138 @@
 ###########
 # the direction that the language is written (ltr = left to right, rtl = right to left)
 language.direction=ltr
+
+# Language names for reuse throughout the application
+lang.afr=Afrikaans
+lang.amh=Amharic
+lang.ara=Arabic
+lang.asm=Assamese
+lang.aze=Azerbaijani
+lang.aze_cyrl=Azerbaijani (Cyrillic)
+lang.bel=Belarusian
+lang.ben=Bengali
+lang.bod=Tibetan
+lang.bos=Bosnian
+lang.bre=Breton
+lang.bul=Bulgarian
+lang.cat=Catalan
+lang.ceb=Cebuano
+lang.ces=Czech
+lang.chi_sim=Chinese (Simplified)
+lang.chi_sim_vert=Chinese (Simplified, Vertical)
+lang.chi_tra=Chinese (Traditional)
+lang.chi_tra_vert=Chinese (Traditional, Vertical)
+lang.chr=Cherokee
+lang.cos=Corsican
+lang.cym=Welsh
+lang.dan=Danish
+lang.dan_frak=Danish (Fraktur)
+lang.deu=German
+lang.deu_frak=German (Fraktur)
+lang.div=Divehi
+lang.dzo=Dzongkha
+lang.ell=Greek
+lang.eng=English
+lang.enm=English, Middle (1100-1500)
+lang.epo=Esperanto
+lang.equ=Math / equation detection module
+lang.est=Estonian
+lang.eus=Basque
+lang.fao=Faroese
+lang.fas=Persian
+lang.fil=Filipino
+lang.fin=Finnish
+lang.fra=French
+lang.frk=Frankish
+lang.frm=French, Middle (ca.1400-1600)
+lang.fry=Western Frisian
+lang.gla=Scottish Gaelic
+lang.gle=Irish
+lang.glg=Galician
+lang.grc=Ancient Greek
+lang.guj=Gujarati
+lang.hat=Haitian, Haitian Creole
+lang.heb=Hebrew
+lang.hin=Hindi
+lang.hrv=Croatian
+lang.hun=Hungarian
+lang.hye=Armenian
+lang.iku=Inuktitut
+lang.ind=Indonesian
+lang.isl=Icelandic
+lang.ita=Italian
+lang.ita_old=Italian (Old)
+lang.jav=Javanese
+lang.jpn=Japanese
+lang.jpn_vert=Japanese (Vertical)
+lang.kan=Kannada
+lang.kat=Georgian
+lang.kat_old=Georgian (Old)
+lang.kaz=Kazakh
+lang.khm=Central Khmer
+lang.kir=Kirghiz, Kyrgyz
+lang.kmr=Northern Kurdish
+lang.kor=Korean
+lang.kor_vert=Korean (Vertical)
+lang.lao=Lao
+lang.lat=Latin
+lang.lav=Latvian
+lang.lit=Lithuanian
+lang.ltz=Luxembourgish
+lang.mal=Malayalam
+lang.mar=Marathi
+lang.mkd=Macedonian
+lang.mlt=Maltese
+lang.mon=Mongolian
+lang.mri=Maori
+lang.msa=Malay
+lang.mya=Burmese
+lang.nep=Nepali
+lang.nld=Dutch; Flemish
+lang.nor=Norwegian
+lang.oci=Occitan (post 1500)
+lang.ori=Oriya
+lang.osd=Orientation and script detection module
+lang.pan=Panjabi, Punjabi
+lang.pol=Polish
+lang.por=Portuguese
+lang.pus=Pushto, Pashto
+lang.que=Quechua
+lang.ron=Romanian, Moldavian, Moldovan
+lang.rus=Russian
+lang.san=Sanskrit
+lang.sin=Sinhala, Sinhalese
+lang.slk=Slovak
+lang.slk_frak=Slovak (Fraktur)
+lang.slv=Slovenian
+lang.snd=Sindhi
+lang.spa=Spanish
+lang.spa_old=Spanish (Old)
+lang.sqi=Albanian
+lang.srp=Serbian
+lang.srp_latn=Serbian (Latin)
+lang.sun=Sundanese
+lang.swa=Swahili
+lang.swe=Swedish
+lang.syr=Syriac
+lang.tam=Tamil
+lang.tat=Tatar
+lang.tel=Telugu
+lang.tgk=Tajik
+lang.tgl=Tagalog
+lang.tha=Thai
+lang.tir=Tigrinya
+lang.ton=Tonga (Tonga Islands)
+lang.tur=Turkish
+lang.uig=Uighur, Uyghur
+lang.ukr=Ukrainian
+lang.urd=Urdu
+lang.uzb=Uzbek
+lang.uzb_cyrl=Uzbek (Cyrillic)
+lang.vie=Vietnamese
+lang.yid=Yiddish
+lang.yor=Yoruba
+
 addPageNumbers.fontSize=Μέγεθος γραμματοσειράς
 addPageNumbers.fontName=Όνομα γραμματοσειράς
 pdfPrompt=Επιλέξτε PDF(s)