Functional Hook APIs

**Is your feature request related to a problem? Please describe.**

When tapping a hook that provides an abstract data type, we may _only_ care about a specific implementation. A simple early return allows us to "filter" out types we don't care about:

```kotlin
interface Super

class A : Super
class B : Super

val hook: SyncHook<(Super) -> Unit>
hook.tap(name) { super ->
if (super !is A) return@tap

// ...
}
```

**Describe the solution you'd like**

It'd be awesome to have functional methods for hooks, such that we can patternize filtering, data manipulation, etc.

```kotlin
hook.filterIsInstance().tap(name) { a ->
// ...
}
```

This is somewhat difficult to consider for the more complex hook types, since return value is more important. We'd want to ensure we have appropriate handling for each hook type, or not support certain hook types at all.