feat: Implement Steam login initialization logic

- Added SteamLoginInitLogic to handle the initiation of Steam login.
- Created service context for managing configuration and Redis connection.
- Defined types for Steam login requests and callbacks.
- Implemented utility functions for building OpenID query strings and validating responses from Steam.
- Updated go.mod and go.sum to include necessary dependencies.
- Modified GenApi.ps1 script to generate code in the correct directory.

app/internal/handler/routes.go

@@ -0,0 +1,38 @@
+// Code generated by goctl. DO NOT EDIT.
+// goctl 1.8.4
+
+package handler
+
+import (
+	"net/http"
+
+	"git.cialloo.com/CiallooWeb/Authenticator/app/internal/svc"
+
+	"github.com/zeromicro/go-zero/rest"
+)
+
+func RegisterHandlers(server *rest.Server, serverCtx *svc.ServiceContext) {
+	server.AddRoutes(
+		[]rest.Route{
+			{
+				// Ping the server to check if it's alive
+				Method:  http.MethodGet,
+				Path:    "/ping",
+				Handler: pingHandler(serverCtx),
+			},
+			{
+				// Steam login callback
+				Method:  http.MethodGet,
+				Path:    "/steam/callback",
+				Handler: steamLoginCallbackHandler(serverCtx),
+			},
+			{
+				// Initiate Steam login
+				Method:  http.MethodGet,
+				Path:    "/steam/login",
+				Handler: steamLoginInitHandler(serverCtx),
+			},
+		},
+		rest.WithPrefix("/api/authenticator"),
+	)
+}