Add Turkish glossary, translator credits, and fix labels (#656)

* Add Turkish glossary translation and improve title formatting

- Add Turkish (TR) as fourth glossary language alongside English, German, Arabic
- Generate 261 Turkish glossary entries from Google Sheet TR_ columns
- Create Turkish landing page with translated background, citation, and project status
- Add Turkish language button to all glossary landing pages
- Add Turkish UI label translations (definition, references, etc.) to single.html
- Change English title delimiter from parentheses to square brackets for all
  non-English entries to avoid nested parentheses, e.g.
  "Ontoloji (Yapay Zeka) [Ontology (Artificial Intelligence)]"
- Update language switcher template to parse square bracket format
- Skip appending English title when all its words already appear in the
  localized title (e.g. "FORRT", "Python", "Paradata")
- Add filename length truncation (max 200 chars) for entries with very long titles

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Fix case-sensitive reference key matching in glossary generator

Add case-insensitive fallback for APA reference lookup, resolving
FORRT2019 -> Forrt2019 and HavenvanGrootel2019 -> HavenVanGrootel2019
mismatches between the Google Sheet and apa_lookup.json.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Move reference list link from glossary entries to landing pages

Remove the per-entry "references work in progress" alert callout from
single.html and add a reference list link to the bottom of each
language landing page instead.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Add translator credits to glossary entries and fix Turkish labels

- Extract translated_by and translation_reviewed_by from spreadsheet
  columns ({LANG}_transl, {LANG}_review) for Arabic, German, Turkish
- Split combined "Drafted and Reviewed by" into separate labels for
  originally drafted by, reviewed by, translated by, and translation
  reviewed by in all languages
- Fix Turkish labels: "Gözden geçirenler" for review (not
  "Denetleyenler"), "Orijinal terimi ve tanımını hazırlayanlar" for
  originally drafted by
- Regenerate all non-English glossary entries with new fields

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: LukasWallrich

content/glossary/_create_glossaries.py

@@ -169,6 +169,17 @@ def clean_filename(title, max_length=200):
             "language": language_name
         }
 
+        # Add translation credits for non-English entries
+        if language_code != 'EN':
+            transl_col = f"{language_code}_transl"
+            review_col = f"{language_code}_review"
+            transl_val = safe_get(row, transl_col)
+            review_val = safe_get(row, review_col)
+            if transl_val:
+                entry["translated_by"] = [name.strip() for name in re.split(r'[,;]', transl_val) if name.strip()]
+            if review_val:
+                entry["translation_reviewed_by"] = [name.strip() for name in re.split(r'[,;]', review_val) if name.strip()]
+
         # Add aliases for English entries
         if language_code == "EN":
             entry["aliases"] = ["/glossary/" + clean_filename(title)]