Feature request: Specify metering position

[DangerD1024]

In code you have:

enum Metering_Modes {
    METERING_CENTRE = libcamera::controls::MeteringCentreWeighted,
    METERING_SPOT = libcamera::controls::MeteringSpot,
    METERING_MATRIX = libcamera::controls::MeteringMatrix,
    METERING_CUSTOM = libcamera::controls::MeteringCustom
};

But there's no option to specify position for METERING_SPOT or others... I need to specify center bottom position for example...