fix(region):基本确定行政区划部分功能，明确模型扫描功能的使用。

controller/region.go

@@ -0,0 +1,40 @@
+package controller
+
+import (
+	"electricity_bill_calc/repository"
+	"electricity_bill_calc/response"
+	"net/http"
+
+	"github.com/gofiber/fiber/v2"
+)
+
+func InitializeRegionHandlers(router *fiber.App) {
+	router.Get("/region/:rid", getSubRegions)
+	router.Get("/regions/:rid", getParentRegions)
+}
+
+func getSubRegions(c *fiber.Ctx) error {
+	result := response.NewResult(c)
+	requestParentId := c.Params("rid")
+	regions, err := repository.RegionRepository.FindSubRegions(requestParentId)
+	if err != nil {
+		return result.Error(http.StatusInternalServerError, err.Error())
+	}
+	if len(regions) == 0 {
+		return result.Json(http.StatusNotFound, "未能获取到相关的行政区划。", fiber.Map{"regions": make([]string, 0)})
+	}
+	return result.Json(http.StatusOK, "已经获取到相关的行政区划。", fiber.Map{"regions": regions})
+}
+
+func getParentRegions(c *fiber.Ctx) error {
+	result := response.NewResult(c)
+	requestRegionCode := c.Params("rid")
+	regions, err := repository.RegionRepository.FindParentRegions(requestRegionCode)
+	if err != nil {
+		return result.Error(http.StatusInternalServerError, err.Error())
+	}
+	if len(regions) == 0 {
+		return result.Json(http.StatusNotFound, "未能获取到相关的行政区划。", fiber.Map{"regions": make([]string, 0)})
+	}
+	return result.Json(http.StatusOK, "以及获取到相关的行政区划。", fiber.Map{"regions": regions})
+}