Overhaul [1/n]

Signed-off-by: Sean Du <do4suki@gmail.com>

internal/handler/api/user/user.go

@@ -0,0 +1,19 @@
+package user
+
+import (
+	"fmt"
+
+	"github.com/gin-gonic/gin"
+)
+
+func UserApi(ctx *gin.Context, action string) (res any, err error) {
+	switch action {
+	case "getNavi":
+		res, err = userGetNavi(ctx)
+	case "userInfo":
+		res, err = userInfo(ctx)
+	default:
+		err = fmt.Errorf("unimplemented action: user: %s", action)
+	}
+	return res, err
+}