Support generating custom resource class name

[Omico]

Assume we have two modules, as shown below.

On app module

app/build.gradle.kts

dependencies {
    implementation(project(":core"))
}

On core module

core/build.gradle.kts

compose {
    resources {
        publicResClass = true
    }
}

core/src/kotlin/CoreRes.kt

typealias CoreRes = Res

Now we cannot use CoreRes.strings.xxx like Res.strings.xxx.

So, we need to add the ability to let users define custom resource class name.

Usage:

compose {
    resources {
        resClassName = "CoreRes"
    }
}