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/cs_CZ/OAuthAccount.json

@@ -1 +1,15 @@
-{}
+{
+  "labels": {
+    "Create OAuthAccount": "Vytvořit OAuth účet",
+    "Connection": "Připojení"
+  },
+  "fields": {
+    "provider": "Poskytovatel",
+    "hasAccessToken": "Má přístupový token",
+    "user": "Uživatel",
+    "providerIsActive": "Poskytovatel je aktivní"
+  },
+  "links": {
+    "provider": "Poskytovatel"
+  }
+}