Chore: Cargo metadata.

Cargo.toml

@@ -1,7 +1,21 @@
+# Copyright (c) 2022 Yakkhini
+# Planting Pong is licensed under Mulan PSL v2.
+# You can use this software according to the terms and conditions of the Mulan PSL v2.
+# You may obtain a copy of Mulan PSL v2 at:
+#          http://license.coscl.org.cn/MulanPSL2
+# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+# EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+# MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+# See the Mulan PSL v2 for more details.
+
 [package]
 name = "pong_planting"
 version = "0.1.0"
+authors = ["Yakkhini <sign@yechanv.cc>"]
 edition = "2021"
+description = "A ECS driven breakout game, writen in Rust, Bevy engine."
+repository = "https://github.com/Yakkhini/PongPlanting"
+license = "Mulan PSL v2"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html