feat: [#28] add base tts service

src/assistant/lib/tts/services.py

@@ -0,0 +1,16 @@
+import abc
+
+import lib.app.settings as app_settings
+import lib.tts.models as tts_models
+
+
+class BaseTTSService(abc.ABC):
+    def __init__(
+        self,
+        settings: app_settings.Settings,
+    ):
+        self.settings = settings
+
+    @abc.abstractmethod
+    def get_tts(self, tts_request: tts_models.TTSRequestModel) -> tts_models.TTSResponseModel:
+        raise NotImplementedError()