VML imports

[squidink7]

Implementing imports in VML would allow large projects to split up their UI into multiple files and reuse components.
The regular V syntax could be re-used for consistency, e.g. below:
main.vml

import PrimaryScreen

Screen {
    id: root
    background: #F1F5F9

    Label { text: "Screen manager" x: 20 y: 14 width: root.width - 40 height: 30 color: #0F172A font_size: 20 bold: true }

    ScreenManager {
        id: navigation
        x: 20
        y: 56
        width: root.width - 40
        height: 240
        current: app.current
        background: #FFFFFF
        corner_radius: 10

        PrimaryScreen {}
    }
}

primary_screen.vml

module PrimaryScreen

Screen {
        id: home
        Label { text: "Home" x: 24 y: 26 width: 240 height: 34 color: #0F172A font_size: 24 bold: true }
        Label { text: "Only this screen is mounted." x: 24 y: 68 width: 300 height: 24 color: #64748B }
        Button { text: "Open details" on_tap: app.show("details") x: 24 y: 116 width: 140 height: 38 background: #2563EB color: #FFFFFF corner_radius: 8 }
}

Though module may not be the most appropriate name for UI elements, input welcome.