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/nl_NL/OAuthProvider.json

@@ -0,0 +1,17 @@
+{
+  "fields": {
+    "isActive": "Is actief",
+    "clientId": "Klant ID",
+    "clientSecret": "Geheime Code",
+    "authorizationEndpoint": "Autorisatie Eindpunt",
+    "tokenEndpoint": "Token Eindpunt",
+    "authorizationRedirectUri": "Autorisatie omleiding URI",
+    "scopes": "Scopen",
+    "hasAccessToken": "Heeft toegangstoken",
+    "authorizationPrompt": "Autorisatievraag",
+    "authorizationParams": "Autorisatieparameters"
+  },
+  "tooltips": {
+    "authorizationParams": "Extra queryparameters die naar het autorisatie-eindpunt moeten worden gestuurd. Opgegeven in JSON-formaat."
+  }
+}