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/infrastructure/persistence/csv_vocabulary_repository.py

@@ -0,0 +1,35 @@
+"""CSV implementation of the vocabulary port.
+
+@file csv_vocabulary_repository.py
+@brief The CsvVocabularyRepository adapter.
+"""
+
+from pathlib import Path
+
+from flash_card.domain.entities.vocabulary import Vocabulary
+from flash_card.domain.errors.vocabulary_errors import VocabularyFormatError
+from flash_card.infrastructure.persistence.csv_word_list import read_word_list
+
+
+class CsvVocabularyRepository:
+    """Loads the delivered word list from a CSV file."""
+
+    def __init__(self, path: Path) -> None:
+        """Create the repository.
+
+        @param path The word list file.
+        """
+        ## @brief The word list file.
+        self._path = path
+
+    def load(self) -> Vocabulary:
+        """Load the word list.
+
+        @return The vocabulary.
+        @throws VocabularyNotFoundError When the file does not exist.
+        @throws VocabularyFormatError When the file is malformed or has no card.
+        """
+        pair, cards = read_word_list(self._path)
+        if not cards:
+            raise VocabularyFormatError(f"{self._path}: word list has no card")
+        return Vocabulary(pair, cards)