Refactor and complete providers

pkg/provider/provider.go

@@ -0,0 +1,15 @@
+package provider
+
+import (
+	"context"
+	"net/http"
+
+	"gitea.libretechconsulting.com/rmcguire/ambient-weather-local-exporter/pkg/weather"
+)
+
+// Simple interface used for converting Wunderground and
+// Ambient Weather Network HTTP requests to a stable struct
+type AmbientProvider interface {
+	ReqToWeather(context.Context, *http.Request) (*weather.WeatherUpdate, error)
+	Name() string
+}