MIL-001: project foundation

pyproject.toml (Python >=3.13, no runtime dependencies, speech and dev extras),
Python .gitignore, layer skeleton with constants.py, Doxyfile, README with the
.venv instructions, the Malay to Danish word list and review record RC-023.

Task: MIL-001#1
Task: MIL-001#2
Task: MIL-001#3
Task: MIL-001#4
Task: MIL-001#5
Task: MIL-001#6

src/flash_card/presentation/__init__.py

@@ -0,0 +1,5 @@
+"""Presentation layer: views, view models and the entry point.
+
+@file __init__.py
+@brief Holds the user interface and the composition root; may import every inner layer.
+"""

src/flash_card/presentation/app.py

@@ -0,0 +1,28 @@
+"""Entry point of the flash card program.
+
+@file app.py
+@brief Starts the program; the window arrives in MIL-002.
+"""
+
+from collections.abc import Sequence
+from typing import NoReturn
+
+
+def main(argv: Sequence[str] | None = None) -> int:
+    """Run the program and return its exit code.
+
+    The window arrives in MIL-002; for now nothing happens.
+
+    @param argv Command line arguments, or None for none.
+    @return The exit code, 0 on success.
+    """
+    return 0
+
+
+def run() -> NoReturn:
+    """Run the program and exit the interpreter with its exit code.
+
+    @return Never returns; the function always raises SystemExit.
+    @throws SystemExit Always, with the exit code of main.
+    """
+    raise SystemExit(main())