refactor(api): restructured API for type safety, maintainability and docs generation

- These changes makes the API incombatible with previous versions
- Added new types for error handling, success responses, and health checks.
- Updated health check logic to utilize the new types for better clarity and structure.
- Refactored existing handlers to improve response consistency and error handling.
- Updated Makefile to include a new target for generating API types from Swagger.
- Updated "new agent" API to respond an encrypted cert pair

internal/api/v1/route/by_provider.go

@@ -0,0 +1,26 @@
+package routeApi
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/yusing/go-proxy/internal/route"
+	"github.com/yusing/go-proxy/internal/route/routes"
+)
+
+type RoutesByProvider map[string][]route.Route
+
+// @x-id				"byProvider"
+// @BasePath		/api/v1
+// @Summary		List routes by provider
+// @Description	List routes by provider
+// @Tags			route
+// @Accept			json
+// @Produce		json
+// @Success		200	{object}	RoutesByProvider
+// @Failure		403	{object}	apitypes.ErrorResponse
+// @Failure		500	{object}	apitypes.ErrorResponse
+// @Router			/route/by_provider [get]
+func ByProvider(c *gin.Context) {
+	c.JSON(http.StatusOK, routes.ByProvider())
+}