Add painterResource for ImageResource

[Alex009]

common:

import androidx.compose.ui.graphics.painter.Painter
import dev.icerock.moko.resources.ImageResource

expect fun painterResource(imageResource: ImageResource): Painter

android:

import androidx.compose.runtime.Composable
import androidx.compose.ui.graphics.painter.Painter
import dev.icerock.moko.resources.ImageResource

@Composable
actual fun painterResource(imageResource: ImageResource): Painter {
    return androidx.compose.ui.res.painterResource(id = imageResource.drawableResId)
}

jvm:

import androidx.compose.runtime.Composable
import androidx.compose.ui.graphics.painter.Painter
import androidx.compose.ui.graphics.toPainter
import dev.icerock.moko.resources.ImageResource

@Composable
actual fun painterResource(imageResource: ImageResource): Painter {
    return imageResource.image.toPainter()
}

[Alex009]

will be released in 0.21.0