import-map don't support db://

[smallmain]

Cocos Creator version

3.8.2

System information

MacOS

Issue description

{
    "imports": {
        "xenon-core": "db://xenon-core/index.ts"
    }
}

or

{
    "imports": {
        "xenon-core": "db://xenon-core/index"
    }
}

Relevant error log output

No response

Steps to reproduce

.

Minimal reproduction project

No response