Add topic for dialog action status

[igonzf]

This pull request adds a new topic /dialog_action. The purpose of this topic is to provide information about the current state of a dialog action.

Details of the Topic (/dialog_action):

• Listen: When the state is 0, it indicates that the dialog action is in the listening process.
• Speak: When the state is 1, it indicates that the dialog action is in the speaking process.
• Think (Query): When the state is 2, it indicates that the dialog action is in the thinking process or performing a query.