[Idea] add ComposePreviewNaming

[egorikftp]

The idea is to align naming of preview composable functions in unified format. we already have PreviewAnnotationNaming and PreviewPublic.

Propose: name: ComposePreviewNaming logic: composable preview function should require Preview postfix

Didn't find any official docs, but Google follow this name convention: https://developer.android.com/develop/ui/compose/tooling/previews

valid code

@Preview
@Composable
private fun SectionCounterPreview() {
    // code
}

invalid

@Preview
@Composable
private fun SectionCounter() {
    // code
}

@Preview
@Composable
private fun PreviewSectionCounter() {
    // code
}