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

honeybeetest/mocks.go

@@ -9,6 +9,11 @@ import (
 	"time"
 )
 
+// Re-exported types for consumer convenience
+
+type Socket = types.Socket
+type Dialer = types.Dialer
+
 // Dialer Mocks
 
 type MockDialer struct {