Add project structure, license, and README for Rock Paper Scissors game

README.md

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+# 🚀 Rock Paper Scissors Game
+
+A beginner-friendly Python program to play Rock, Paper, Scissors against the computer (Udemy's *100 Days of Code™: The Complete Python Pro Bootcamp*, Day 4).
+
+## 📚 Table of Contents
+
+- [Overview](#-overview)
+- [Requirements](#-requirements)
+- [Setup](#-setup)
+- [Run](#-run)
+- [Tests](#-tests)
+- [License](#-license)
+- [Links](#-links)
+
+## 🧭 Overview
+
+You choose `0` (Rock), `1` (Paper) or `2` (Scissors); the computer picks randomly using the `random` module. Both choices are shown as ASCII art, and the winner is decided with `if`/`elif`/`else` logic (rock beats scissors, scissors beats paper, paper beats rock). Draws and invalid input are handled.
+
+![Screenshot of the game](docs/screenshot.png)
+
+## 📋 Requirements
+
+- Python 3.13 or newer
+- No runtime dependencies
+- [pytest](https://pytest.org) for running the tests (installed via the `dev` extra)
+
+## 🛠️ Setup
+
+Create and activate a local virtual environment in `.venv`:
+
+```bash
+python -m venv .venv
+```
+
+Activate it:
+
+```bash
+# Windows (PowerShell)
+.venv\Scripts\Activate.ps1
+
+# Windows (cmd)
+.venv\Scripts\activate.bat
+
+# macOS / Linux / Git Bash
+source .venv/bin/activate        # Git Bash on Windows: source .venv/Scripts/activate
+```
+
+Install the project in editable mode with test tools:
+
+```bash
+python -m pip install -e ".[dev]"
+```
+
+Leave the environment with `deactivate`.
+
+## ▶️ Run
+
+With the virtual environment active:
+
+```bash
+python -m rock_paper_scissors
+```
+
+or, after installing, `rock-paper-scissors`.
+
+## 🧪 Tests
+
+```bash
+python -m pytest
+```
+
+## 📄 License
+
+GNU Affero General Public License v3.0 or later (AGPL-3.0-or-later).
+
+## 🔗 Links
+
+- [Repository](https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code)
+- [Documentation](https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/004-rock_paper_scissors_game#readme)
+- [Issue tracker](https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/004-rock_paper_scissors_game/issues)