Adopt snake_case for route names and paths

Author: ahmedebn

contributing/code/standards.rst

@@ -214,6 +214,8 @@ Naming Conventions
 * Use `snake_case`_ for configuration parameters and Twig template variables
   (e.g. ``framework.csrf_protection``, ``http_status_code``);
 
+* Use `snake_case`_ for configuration route names and paths;
+
 * Use SCREAMING_SNAKE_CASE for constants (e.g. ``InputArgument::IS_ARRAY``);
 
 * Use `UpperCamelCase`_ for enumeration cases (e.g. ``InputArgumentMode::IsArray``);