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/domain/__init__.py

@@ -0,0 +1,6 @@
+"""Domain layer: entities and rules of the flash card program.
+
+@file __init__.py
+@brief Holds entities, value objects and rules.
+May import nothing outside the standard library.
+"""