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/Admin.json

@@ -0,0 +1,12 @@
+{
+  "layouts": {
+    "detailConvert": "Μετατροπή του lead",
+    "listForAccount": "Λίστα (για τις Εταιρίες)",
+    "listForContact": "Λίστα (για Επαφή)"
+  },
+  "templates": {
+    "invitation": "Πρόσκληση",
+    "reminder": "Υπενθύμιση",
+    "cancellation": "Ακύρωση"
+  }
+}