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/WebhookEventQueueItem.json

@@ -0,0 +1,12 @@
+{
+  "fields": {
+    "event": "Událost",
+    "target": "Cíl",
+    "isProcessed": "Je zpracováno",
+    "user": "Uživatel"
+  },
+  "links": {
+    "target": "Cíl",
+    "user": "Uživatel"
+  }
+}