docs: add description and license info

Cargo.toml

@@ -1,7 +1,9 @@
 [package]
 name = "rs-cube"
-version = "0.1.0"
+version = "1.0.0"
 edition = "2021"
+description = "Blazingly fast 3D ASCII Rubik's Cube"
+license = "MIT OR Apache-2.0"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

README.md

@@ -1 +1,8 @@
 # rs-cube
+
+Blazingly fast 3D ASCII Rubik's Cube
+
+## License
+
+rs-cube is dual-licensed under the terms of both the MIT License and the Apache License 2.0
+SPDX-License-Identifier: MIT OR Apache-2.0

src/main.rs

@@ -1,3 +1,6 @@
+// Copyright (c) 2023 doprz
+// SPDX-License-Identifier: MIT OR Apache-2.0
+
 use clap::Parser;
 use libc::{ioctl, winsize, STDOUT_FILENO, TIOCGWINSZ, signal, SIGINT};
 use std::io::{self, Write};