refactor: streamline chat widget and backend user management

- Removed the .editorconfig file to simplify project configuration.
- Refactored the ChatWidget component to enhance readability and maintainability, including the integration of current user data and improved notification handling.
- Updated backend functions to utilize the new getCurrentUserFunction for user authentication, ensuring consistent user data retrieval across various modules.
- Cleaned up code in multiple backend files, enhancing clarity and performance while maintaining functionality.
- Improved error handling and user feedback mechanisms in user-related operations.

.editorconfig

@@ -1,12 +0,0 @@
-# EditorConfig is awesome: https://EditorConfig.org
-
-# top-most EditorConfig file
-root = true
-
-[*]
-indent_style = space
-indent_size = 2
-end_of_line = lf
-charset = utf-8
-trim_trailing_whitespace = false
-insert_final_newline = false