Manifest file definition

It's very simple because you don't have to write the extension points in JSON as follows: If you use the project template, the initial settings are automatically set as shown below.

{
    "name": "SampleExtension", //Make sure every extension is unique.
    "main": "SampleExtension.dll", //Must be the same as the assembly file name of the project.
    "lifecycle": "application"
}