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/metadata/fields/date.json

@@ -22,6 +22,7 @@
                 "javascript: return this.dateTime.getDateShiftedFromToday(8, 'days');",
                 "javascript: return this.dateTime.getDateShiftedFromToday(9, 'days');",
                 "javascript: return this.dateTime.getDateShiftedFromToday(10, 'days');",
+                "javascript: return this.dateTime.getDateShiftedFromToday(30, 'days');",
                 "javascript: return this.dateTime.getDateShiftedFromToday(1, 'weeks');",
                 "javascript: return this.dateTime.getDateShiftedFromToday(2, 'weeks');",
                 "javascript: return this.dateTime.getDateShiftedFromToday(3, 'weeks');",