refactor: switch router to gin

internal/driver/activate.go

@@ -1,13 +1,15 @@
 package driver
 
 import (
-	"encoding/json"
 	"net/http"
+
+	"github.com/gin-gonic/gin"
 )
 
-func Activate(w http.ResponseWriter, r *http.Request) {
-	resp := map[string]any{
-		"Implements": []string{"VolumeDriver"},
-	}
-	_ = json.NewEncoder(w).Encode(resp)
+func Activate(c *gin.Context) {
+	c.JSON(http.StatusOK, gin.H{
+		"Implements": []string{
+			"VolumeDriver",
+		},
+	})
 }