refactor(v3): split interactions into modules

The `pact` module was getting a little crowded. As a result, the
following classes have been split into their own modules:

- `Interaction` -> `interaction/__init__.py`
- `HttpInteraction` -> `interaction/http_interaction.py`
- `SyncMessageInteraction` -> `interaction/sync_message_interaction.py`
- `AsyncMessageInteraction` -> `interaction/async_message_interaction.py`

I am also removing the exporting of `Interaction` within the root
`pact.v3` module, as end-users should never be instantiating
interactions directly.

Signed-off-by: JP-Ellis <josh@jpellis.me>

Author: JP-Ellis

src/pact/v3/__init__.py

@@ -20,9 +20,8 @@
     considered deprecated, and will be removed in a future release.
 """
 
-from pact.v3.pact import Interaction, Pact
+from pact.v3.pact import Pact
 
 __all__ = [
     "Pact",
-    "Interaction",
 ]