[IDEA] - When the link has a timestamp, ask for seek

[AleixFerre]

In the following commands:

• Play (when there's no song playing)
• PlayNow

All commands that play the song NOW

Steps

• If it's a timestamp in the link
• Send a message to the author via the same channel
• This message will ask if you want to play the song from the beginning or at the timestamp?
• If the answer is "Beginning" => Continue doing the same as now
• If the answer is "Timestamp" => Seek for this time in the song

Notes

We can actually reuse the function "Seek" to implement this functionality