MIL-003: Step 2 - New flash cards

Review record RC-025 (Go, autonomous mode, not independent).

Task: MIL-003#1
Task: MIL-003#2
Task: MIL-003#3
Task: MIL-003#4
Task: MIL-003#5

src/flash_card/application/use_cases/open_study_session.py

@@ -0,0 +1,27 @@
+"""Start a study session.
+
+@file open_study_session.py
+@brief The open_study_session use case.
+"""
+
+from collections.abc import Callable, Sequence
+
+from flash_card.application.use_cases.study_session import StudySession
+from flash_card.domain.entities.card import Card
+from flash_card.domain.entities.deck import Deck
+from flash_card.domain.repositories.vocabulary_repository import VocabularyRepository
+
+
+def open_study_session(
+    vocabulary_repository: VocabularyRepository,
+    choose: Callable[[Sequence[Card]], Card],
+) -> StudySession:
+    """Load the word list and build a session over all its cards.
+
+    @param vocabulary_repository Source of the word list.
+    @param choose Picks one card from a non-empty sequence.
+    @return The new session.
+    @throws VocabularyError When the word list cannot be loaded.
+    """
+    deck = Deck.from_vocabulary(vocabulary_repository.load())
+    return StudySession(deck, choose)