MIL-006: Spoken Malay word

Review record RC-028 (Go, autonomous mode, not independent).

Task: MIL-006#1
Task: MIL-006#2
Task: MIL-006#3
Task: MIL-006#4
Task: MIL-006#5

src/flash_card/application/ports/speech_port.py

@@ -0,0 +1,22 @@
+"""Port for spoken words.
+
+@file speech_port.py
+@brief The SpeechPort interface the study session uses to say a word aloud.
+"""
+
+from typing import Protocol
+
+
+class SpeechPort(Protocol):
+    """Speaks a text aloud in a language."""
+
+    def speak(self, text: str, language_code: str) -> None:
+        """Speak a text without blocking the caller for long.
+
+        An implementation does not raise: a failure is logged and ignored.
+
+        @param text The text to speak.
+        @param language_code Language of the text, for example "ms".
+        @return Nothing.
+        """
+        ...