Making the UI as an extension point as well

[LinuxSuRen]

Now, we have serval extension points:

• storage
• secret

Actually, providing UI extension is also very important. Different protocals have different elements, it's better to load the corresponding page instead of putting all things together. For example, gRPC, HTTP, and webSocket might be very different with each other.

Suggested extension points might be:

• [UI] Store editing and creating page
• [UI] TestCase page

There are some potential solutions:

• SSR aka Server-Side Rendering