feat: Add Agent Chat History Popup for Enhanced User Interaction

- Introduced the AgentChatHistoryPopup class to provide a sidebar for displaying recent chat messages, improving accessibility and user experience.
- Implemented message filtering options (All, User Only, Agent Only) and auto-scroll functionality for better message management.
- Enhanced the AgentChatWidget to synchronize chat history with the new popup, ensuring users have up-to-date information at their fingertips.
- Updated CMake configuration to include the new build_cleaner target for improved project maintenance.

CMakeLists.txt

@@ -394,3 +394,9 @@ endif()
 # Packaging configuration
 include(cmake/packaging.cmake)
 
+add_custom_target(build_cleaner
+  COMMAND ${CMAKE_COMMAND} -E echo "Running scripts/build_cleaner.py --dry-run"
+  COMMAND ${CMAKE_COMMAND} -E chdir ${CMAKE_SOURCE_DIR} ${Python3_EXECUTABLE} scripts/build_cleaner.py --dry-run
+  COMMENT "Validate CMake source lists and includes"
+)
+