Improve overall documentation (#148)

* improve overall documentation

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* fix tests to use scope.Resolver over scope

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

syft/event/event.go

@@ -1,3 +1,7 @@
+/*
+Package event provides event types for all events that the syft library published onto the event bus. By convention, for each event
+defined here there should be a corresponding event parser defined in the parsers/ child package.
+*/
 package event
 
 import "github.com/wagoodman/go-partybus"

syft/event/parsers/parsers.go

@@ -1,3 +1,6 @@
+/*
+Package parsers provides parser helpers to extract payloads for each event type that the syft library publishes onto the event bus.
+*/
 package parsers
 
 import (