Add buildPersistentList { }, buildPersistentMap { }, buildPersistentSet { } to match the builders in kotlin stdlib

[yogurtearl]

Add buildPersistentList { }, buildPersistentMap { }, buildPersistentSet { } to match the collection builders in kotlin stdlib

I would imagine it would look something like this:

fun <E> buildPersistentList(block: PersistentList.Builder<E>.() -> Unit): PersistentList<E> = 
    persistentListOf<E>().builder().apply(block).build() 

[Shusek]

I think it's a good idea but it should be inlined because otherwise it doesn't work at @Composable functions.

[Goooler]

Addressing the fix to #166, can you take a review?