refactor: move gateway and vault components to new locations

gateway/handlers/index.go

@@ -0,0 +1,14 @@
+package handlers
+
+import (
+	"github.com/labstack/echo/v4"
+	"github.com/onsonr/sonr/app/gateway/context"
+)
+
+func IndexHandler(c echo.Context) error {
+	id := context.GetSessionID(c)
+	if id == "" {
+		context.NewSession(c)
+	}
+	return context.RenderInitial(c)
+}