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/cs_CZ/DocumentFolder.json

@@ -1,9 +1,10 @@
-{
-  "labels": {
-    "Create DocumentFolder": "Vytvořit složku",
-    "Manage Categories": "Spravovat složky"
-  },
-  "links": {
-    "documents": "Dokumenty"
-  }
+{
+  "labels": {
+    "Create DocumentFolder": "Vytvořit složku",
+    "Manage Categories": "Spravovat složky",
+    "Documents": "Dokumenty"
+  },
+  "links": {
+    "documents": "Dokumenty"
+  }
 }