Added owlbot.testing package with pytest plugin, event factories, and recording Owncast stubs for module tests.

- owlbot.testing.plugin: fixtures that mirror ModuleLoader's wiring (module_context, module_lifecycle, command/event/route dispatchers, in-memory storage, real Config on a tmp YAML, HttpClient with aioresponses interception, and an aiohttp route_client).
- owlbot.testing.helpers: make_user, make_chat_event, and factories for every Owncast event type, with sensible defaults.
- owlbot.testing.stubs: RecordingOwncastClient and RecordingOwncastAdminClient that log each call to a .calls list in place of hitting the API.
- pyproject.toml: added a 'testing' extra for downstream module authors (pytest, pytest-asyncio, pytest-aiohttp, aioresponses).
- tests: migrated in-tree tests to the new helpers, moved module tests under tests/builtin_modules/, and swapped freezegun for time-machine.

owlbot/testing/__init__.py

@@ -0,0 +1,49 @@
+# Copyright 2026 Logan Fick
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Testing utilities for Owlbot modules."""
+
+from owlbot.testing.helpers import (
+    make_chat_event,
+    make_name_changed_event,
+    make_stream_started_event,
+    make_stream_status,
+    make_stream_stopped_event,
+    make_stream_title_updated_event,
+    make_user,
+    make_user_joined_event,
+    make_user_parted_event,
+    make_visibility_update_event,
+)
+from owlbot.testing.stubs import (
+    RecordedCall,
+    RecordingOwncastAdminClient,
+    RecordingOwncastClient,
+)
+
+__all__ = [
+    "RecordedCall",
+    "RecordingOwncastAdminClient",
+    "RecordingOwncastClient",
+    "make_chat_event",
+    "make_name_changed_event",
+    "make_stream_started_event",
+    "make_stream_status",
+    "make_stream_stopped_event",
+    "make_stream_title_updated_event",
+    "make_user",
+    "make_user_joined_event",
+    "make_user_parted_event",
+    "make_visibility_update_event",
+]