added a readme

README.md

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+# rs48
+
+## Description
+
+It is a game of 2048 that plays in the terminal as a TUI, it has a lot of
+configurability and implements a few types of AI.
+
+## Usage
+
+Compiled with the [rustup toolchain](https://rustup.rs).
+
+### Building
+
+```powershell
+cargo build
+```
+
+### Running
+
+```powershell
+cargo run
+```