exit: move final and early code to internal package

Exit cleanup state information is now stored in a dedicated struct and built up using methods of that struct.

Signed-off-by: Ophestra Umiker <cat@ophivana.moe>

internal/state/enablement.go

@@ -1,34 +0,0 @@
-package state
-
-type (
-	Enablement  uint8
-	Enablements uint64
-)
-
-const (
-	EnableWayland Enablement = iota
-	EnableX
-	EnableDBus
-	EnablePulse
-
-	enableLength
-)
-
-var enablementString = [enableLength]string{
-	"Wayland",
-	"X11",
-	"D-Bus",
-	"PulseAudio",
-}
-
-func (e Enablement) String() string {
-	return enablementString[e]
-}
-
-func (e Enablement) Mask() Enablements {
-	return 1 << e
-}
-
-func (es Enablements) Has(e Enablement) bool {
-	return es&e.Mask() != 0
-}