wifi/espat, rtl8720dn, wifinina: move towards standard common interface for wifi adaptors

Signed-off-by: deadprogram <ron@hybridgroup.com>

wifi.go

@@ -0,0 +1,16 @@
+package drivers
+
+import (
+	"errors"
+	"time"
+)
+
+var (
+	ErrWiFiMissingSSID    = errors.New("missing SSID")
+	ErrWiFiConnectTimeout = errors.New("WiFi connect timeout")
+)
+
+type WiFiDriver interface {
+	ConnectToAccessPoint(ssid, pass string, timeout time.Duration) error
+	Disconnect() error
+}