remove internal packages, move everything into q3rcon

{request}.buf initialised with 0 length.

encoder, decoder interfaces added.

conn.go

@@ -0,0 +1,53 @@
+package q3rcon
+
+import (
+	"fmt"
+	"net"
+
+	"github.com/charmbracelet/log"
+)
+
+type UDPConn struct {
+	conn *net.UDPConn
+}
+
+func newUDPConn(host string, port int) (*UDPConn, error) {
+	udpAddr, err := net.ResolveUDPAddr("udp4", net.JoinHostPort(host, fmt.Sprintf("%d", port)))
+	if err != nil {
+		return nil, err
+	}
+	conn, err := net.DialUDP("udp4", nil, udpAddr)
+	if err != nil {
+		return nil, err
+	}
+	log.Infof("Outgoing address %s", conn.RemoteAddr())
+
+	return &UDPConn{
+		conn: conn,
+	}, nil
+}
+
+func (c *UDPConn) Write(buf []byte) (int, error) {
+	n, err := c.conn.Write(buf)
+	if err != nil {
+		return 0, err
+	}
+
+	return n, nil
+}
+
+func (c *UDPConn) Read(buf []byte) (int, error) {
+	rlen, _, err := c.conn.ReadFromUDP(buf)
+	if err != nil {
+		return 0, err
+	}
+	return rlen, nil
+}
+
+func (c *UDPConn) Close() error {
+	err := c.conn.Close()
+	if err != nil {
+		return err
+	}
+	return nil
+}