Allow redefining kernel help_links with ILUA_HELP_LINKS environment variable

[hroncok]

The ILUA_HELP_LINKS variable can be set in kernel.json file like this:

{
    "argv":
    [
        "python",
        "-m",
        "ilua.app",
        "-c",
        "{connection_file}",
        "-i",
        "rpmlua"
    ],
    "display_name": "RPM Lua",
    "language": "lua",
    "interrupt_mode": "message",
    "env": {
        "ILUA_HELP_LINKS": "[{\"text\": \"Lua in RPM\", \"url\": \"https://rpm-software-management.github.io/rpm/manual/lua.html\"}]"
    }
}

The nested json in json syntax is a bit hard to read, but OTOH json works well for serializing a list of dictionaries to an environment variable.

Fixes https://github.com/guysv/ilua/issues/15

[guysv]

great work 😅

[hroncok]

@guysv May I kindly ask you for a new release?

[guysv]

Oh man that maintenance was due. I hear you.