Extracts contact information from a given email thread.
The function uses a regular expression to match and extract the name and email of each contact in the thread.
It ensures that no duplicate contacts are added to the result.
Parameters
thread: string
The email thread from which to extract contacts.
Returns [string, string][]
An array of tuples, where each tuple contains the name and email of a contact.
Extracts contact information from a given email thread. The function uses a regular expression to match and extract the name and email of each contact in the thread. It ensures that no duplicate contacts are added to the result.