Merge development v2.6.0 into main

Resolved conflicts by taking development (v2.6.0) version for all files.
Removed statistics.twig (replaced by Statistics plugin).

.gitignore

@@ -30,11 +30,22 @@ public/themes/
 # Temporary files
 *.tmp
 *.temp
+.bak/
 
 # Local configuration & credentials
 config.json
+config.*.json
+!config.json.example
 admin/config/admin.json
 
-# No content
+# No content (per-domain content dirs included)
 content/
+content-*/
 !content/.gitkeep
+
+# Test results
+pentest_results.*
+accessibility-test-results.*
+enhanced-test-results.*
+cli/test/functional/test-report*.md
+cli/test/functional/function-test.md