fix: systemjs dynamically import error

[includeios]

Description

Plugin will get an error when importing a dynamical systemjs module, as this issues say

Uncaught (in promise) TypeError: remote.init is not a function

Because the plugin deals with systemjs as same as esm. but systemjs need to use System.import to import dynamic modules according to systemjs readme, and I think it is better to add a hint: we need to manually import systemjs in the project when you need remotes systemjs format module. Thank you

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

[ruleeeer]

Theoretically, this part of the code should be completed by vite rather than manually. When we set format: 'systemjs', import should be automatically changed to module.import.

[ruleeeer]

You can change the format in the configuration file of vite to see if the conversion of import->module.import has occurred.Of course, it is also possible that I missed some special usage scenarios..

build: {
        rollupOptions: {
            output: {
                format:'system'
            }
        }
    }