Remove root honeybee package; promote inbound and outbound as primary API

- Delete honeybee.go (coincidental-strength re-export module)
- Add Socket, InboxMessage, NormalizeURL re-exports to inbound/pool.go
- Add InboxMessage, Dialer, NormalizeURL re-exports to outbound/pool.go
- Add Socket, Dialer re-exports to honeybeetest/mocks.go
- Update README, CONFIG, EXTEND to reflect new import structure

outbound/pool.go

@@ -11,6 +11,13 @@ import (
 	"time"
 )
 
+// Re-exported types for consumer convenience
+
+type InboxMessage = types.InboxMessage
+type Dialer = types.Dialer
+
+var NormalizeURL = transport.NormalizeURL
+
 // Types
 
 type PoolEventKind string