feat: implement coinank free kline api and kline websocket (#1281)

- implement coinank free kline api in coinank_api.Kline
- implement coinank free kline ws in coinank_api.KlineWs. if needKline is true, kline data read from KlineCh. if needTicker is true, tickers data  read from TickersCh.

provider/coinank/coinank_api/klinw_ws_test.go

@@ -0,0 +1,60 @@
+package coinank_api
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"nofx/provider/coinank/coinank_enum"
+	"testing"
+	"time"
+)
+
+func TestKlineWs(t *testing.T) {
+	ctx := context.TODO()
+	ws, err := WsConn(ctx, true, true)
+	if err != nil {
+		t.Fatal(err)
+	}
+	go func() {
+		for tickers := range ws.TickersCh {
+			msg, err := json.Marshal(tickers)
+			if err != nil {
+				fmt.Println("json err:", err)
+			}
+			fmt.Println(string(msg))
+		}
+		fmt.Println("tickersCh closed")
+	}()
+	go func() {
+		for kline := range ws.KlineCh {
+			msg, err := json.Marshal(kline)
+			if err != nil {
+				fmt.Println("json err:", err)
+			}
+			fmt.Println(string(msg))
+		}
+		fmt.Println("kline closed")
+	}()
+	err = ws.Subscribe("BTCUSDT", coinank_enum.Binance, coinank_enum.Minute1)
+	if err != nil {
+		t.Fatal(err)
+	}
+	fmt.Println("sub success")
+	time.Sleep(10 * time.Second)
+	err = ws.UnSubscribe("BTCUSDT", coinank_enum.Binance, coinank_enum.Minute1)
+	if err != nil {
+		t.Fatal(err)
+	}
+	fmt.Println("unsub success")
+	time.Sleep(10 * time.Second)
+	err = ws.Subscribe("BTCUSDT", coinank_enum.Binance, coinank_enum.Hour1)
+	if err != nil {
+		t.Fatal(err)
+	}
+	fmt.Println("resub success")
+	time.Sleep(10 * time.Second)
+	ws.Close()
+	fmt.Println("cancel success")
+	time.Sleep(10 * time.Second)
+	fmt.Println("all success")
+}