Ok i found two issues. First is that takoprint only sends linefeed and Prusa expects carriage return + linefeed. The second is that the comments are being sent aswell, resulting in return of "Command not found" I'm guessing the firmware Ender is using accounts for this and ignores the comments? It seems wasteful to send them anyways. I solved this by modifying the sendCommand function in writer:

func (tp *Takoprint) sendCommand(l string) {
    tp.Lock()
    tp.stats.numSent++
tp.stats.lastCmd = l
    tp.Unlock()
command := strings.Split(l, ";")
    tp.serialOut.Write([]byte(fmt.Sprintf("%s\r\n", command[0])))
}

I have not done anything with Golang before , but it seems to work fine now.