Add screenshots, finish README, add wiki in en, da and ms, re-review MIL-004 (MIL-004)

Task: MIL-004#1
Task: MIL-004#2
Task: MIL-004#3
Task: MIL-004#4

wiki/Description.md

@@ -0,0 +1,35 @@
+**English** | [Dansk](Description.da) | [Bahasa Melayu](Description.ms)
+
+# Description
+
+The game follows the three lectures of day 25. This page explains how the code is built.
+
+## Game rules
+
+- The window shows the blank map from `blank_states_img.gif`.
+- The prompt title shows how many states are named, for example `14/50 States Correct`.
+- An answer is matched to a state without regard to case or surrounding spaces.
+- A correct state is written on the map at its `x` and `y` from `50_states.csv`; a wrong or repeated answer asks again.
+- `exit` or Cancel ends the game; the states not named are saved to `states_to_learn.csv`.
+
+## Modules
+
+| Module | Responsibility |
+| --- | --- |
+| `constants.py` | Every constant: titles, file names, column names, limits |
+| `states.py` | The rules: `State`, `find_state`, `get_missing_states`; no files, no screen |
+| `storage.py` | Reads `50_states.csv` and writes `states_to_learn.csv` with the standard library `csv` module |
+| `game.py` | The guess loop `play` and `run_game`, working through a `GameScreen` protocol |
+| `turtle_screen.py` | The only module that imports `turtle`: map, prompt, state names, click coordinates |
+| `main.py` | Entry point that connects the parts |
+
+## Tests, CI and documentation
+
+- `python -m pytest` runs the tests with a fake screen, so no window opens.
+- `.gitea/workflows/run-tests.yml` runs ruff, mypy, yamllint and pytest on every push and pull request.
+- `doxygen Doxyfile` builds the source documentation into `docs/build/doxygen`.
+
+```bash
+python -m pytest
+doxygen Doxyfile
+```