DEV 1793: Track latency, status codes, and errors from CLI games (#113)

* track latency and status code from CLI games

* actually track errors from snake responses

cli/commands/http.go

@@ -0,0 +1,28 @@
+package commands
+
+import (
+	"io"
+	"net/http"
+	"time"
+)
+
+type TimedHttpClient interface {
+	Get(url string) (*http.Response, time.Duration, error)
+	Post(url string, contentType string, body io.Reader) (*http.Response, time.Duration, error)
+}
+
+type timedHTTPClient struct {
+	*http.Client
+}
+
+func (client timedHTTPClient) Get(url string) (*http.Response, time.Duration, error) {
+	startTime := time.Now()
+	res, err := client.Client.Get(url)
+	return res, time.Since(startTime), err
+}
+
+func (client timedHTTPClient) Post(url string, contentType string, body io.Reader) (*http.Response, time.Duration, error) {
+	startTime := time.Now()
+	res, err := client.Client.Post(url, contentType, body)
+	return res, time.Since(startTime), err
+}