Comments 5.1

Fixed: Resolved an issue with caching search results due to a missing session start.
Added: Text Domain and Domain Path in the plugin header for proper internationalization.
Added: Created a languages directory with the standard placeholder file for localization support.
Added: Implemented standard localization support throughout the extension.
Added: Enhanced comment sections with dynamic placeholder messaging for cases with no available content.
Added: Expanded comment management with support for comments search by selecting clients, in addition to sites and groups.
Updated: Refined visual design of dropdown menus with improved iconography and adjusted layout for comment details.
Updated: Introduced a new widget footer with a management button for comment handling.
Updated: Implemented an accordion layout in the filtering options for better organization.
Updated: Revised the comments table by removing the footer and adjusting column widths for improved readability.
Updated: Enhanced visual presentation of comment details with updated text styling and refreshed dropdown icons for a clearer action interface.