- Added `using` directives for essential namespaces in `Plugin.cs`.
- Implemented a "set" subcommand for configuring activity options, including color and prefix/suffix settings.
- Added error handling for duplicate and invalid inputs, with user feedback via chat.
- Updated the configuration for the first activity based on user input.
Updated `Updater.cs` to improve functionality for retrieving the currently playing track in Spotify. Added new methods for window title retrieval and utilized the `EnumWindows` function to filter and identify relevant Spotify track titles. Included P/Invoke declarations for Windows API functions to support these enhancements, along with a new method `GetWindowTitle` for better code organization.
