MIL-002 NATO converter: modelling, converter code, tests and Doxygen comments

User story, use case and SSD for "spell a word"; spell_word with
try/except KeyError, generate_phonetic with the retry loop, console and CSV
adapters, 49 pytest tests; MIL-002 and the modelling documents accepted with
review records.

Task: MIL-002#1
Task: MIL-002#2
Task: MIL-002#3
Task: MIL-002#4
Task: MIL-002#5
Task: MIL-002#6

src/nato_phonetic_alphabet/main.py

@@ -0,0 +1,32 @@
+"""@brief Composition root: wires the adapters into the use case."""
+
+from nato_phonetic_alphabet import constants
+from nato_phonetic_alphabet.adapters.console import TerminalConsole
+from nato_phonetic_alphabet.adapters.csv_alphabet import load_nato_dict
+from nato_phonetic_alphabet.application.phonetic import generate_phonetic
+from nato_phonetic_alphabet.application.ports import InputClosedError
+from nato_phonetic_alphabet.domain.spelling import InvalidWordError, spell_word
+
+__all__ = [
+    "InvalidWordError",
+    "generate_phonetic",
+    "load_nato_dict",
+    "main",
+    "spell_word",
+]
+
+
+def main() -> int:
+    """@brief Run the interactive tool.
+
+    Ends without a result when the user can give no more input.
+
+    @return The exit status of the program.
+    """
+    console = TerminalConsole()
+    try:
+        code_words = generate_phonetic(load_nato_dict(), console)
+    except InputClosedError:
+        return constants.EXIT_OK
+    console.show_code_words(code_words)
+    return constants.EXIT_OK