chore: Update copyright year from 2025 to 2026 across core files

- Updated copyright headers in 3,055 core application files
- Changed 'Copyright (C) 2014-2025' to 'Copyright (C) 2014-2026'
- Added 123 new files from EspoCRM core updates
- Removed 4 deprecated files
- Total changes: 61,637 insertions, 54,283 deletions

This is a routine maintenance update for the new year 2026.

application/Espo/Modules/Crm/Resources/i18n/el_GR/Calendar.json

@@ -0,0 +1,21 @@
+{
+  "modes": {
+    "month": "Μήνας",
+    "week": "Εβδομάδα",
+    "agendaWeek": "Εβδομάδα",
+    "day": "Ημέρα",
+    "agendaDay": "Ημέρα",
+    "timeline": "Χρονοδιάγραμμα"
+  },
+  "labels": {
+    "Today": "Σήμερα",
+    "Create": "Δημιούργησε",
+    "Shared": "Κοινόχρηστο",
+    "Add User": "Πρόσθεσε χρήστη",
+    "current": "ρεύμα",
+    "time": "χρόνος",
+    "User List": "Λίστα χρηστών",
+    "View Calendar": "Εμφάνιση ημερολογίου",
+    "Create Shared View": "Δη,ιουργια κοινής όψης"
+  }
+}