Legacy support

Changelog summary

New Features

• Updated package manager to Rokit and updated tools.
• Added compatibility for when the legacy ChatService is being used.
• Introduced the ChannelAdded event as legacy also supported that.
• Changed extra data handler to run on OnIncomingMessage, instead of OnChatWindowAdded to support third party chat UI.

Bug Fixes

• Resolved issues where channels were not recognized in certain scenarios.
• Addressed type-related errors and fixed a few text typos.