Enhancement: Enhance Memory Command for Character Presence in Invaded Channels

[sum117]

Currently, our memory command simply sends a message tagging a user and announcing their arrival in an invaded channel. We need to improve this feature to make it clear that the character present in the channel is a Memory, by updating the memory field state and adjusting the embed colors and titles to provide relevant information about the Memory being used.

Tasks:

1. Update the memory command to include information about the character's Memory status when entering an invaded channel.
2. Modify the embed colors and titles to reflect the character's Memory status, providing relevant information to other users in the channel.
3. Implement a command (/memory without any arguments) that allows the user to depart from a channel, setting their character's Memory state to "off."

When a user enters an invaded channel as a Memory, the system should clearly indicate their Memory status to other users in the channel. To leave the channel, the user should be able to use the /memory command without any arguments, which will also update their character's Memory state to "off."

Please implement these changes and let me know if you need any additional information or clarification.