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/Resources/i18n/en_US/Admin.json

@@ -124,6 +124,7 @@
         "personName": "Person Name",
         "autoincrement": "Auto-increment",
         "bool": "Boolean",
+        "decimal": "Decimal",
         "currency": "Currency",
         "currencyConverted": "Currency (Converted)",
         "date": "Date",