[Feature] add custom layout template

[sunmery]

What problem is the feature used to solve?
This feature aims to eliminate the need for developers to repeatedly copy and paste fixed layout code, allowing teams to define a reusable layout template. By offering a customizable layout, developers can define the structure once and reuse it across different microservices or components, thus improving consistency, development efficiency, and maintainability.

Requirements description of the feature
We propose adding a customizable layout template feature to the framework. This layout should support defining a base structure with placeholders where the content can be injected dynamically based on specific services or microservices. The layout should be flexible and configurable, enabling developers to easily adjust it for different use cases.