Clarify the license

[Xuanwo]

Hello, thank you so much for this fantastic project! I'm a member of the OpenDAL community, and we've been closely following your project for quite some time: apache/opendal#3144.

The only barrier to integrating your project is the licensing issue. Which license does this project use? Please clarify by including a LICENSE file in the repository. I'm happy to create a PR for this if you'd like.

I noticed you've set the Apache 2.0 license for the Rust crate; does this cover the entire repository?

hdfs-native/rust/Cargo.toml

Line 11 in 6be6a72

license = "Apache-2.0"

[Kimahriman]

This is my first public project so I'm not terribly familiar with the whole license process, but the whole project should be covered by Apache 2.0. Feel free to make a PR!

[Xuanwo]

This is my first public project so I'm not terribly familiar with the whole license process, but the whole project should be covered by Apache 2.0. Feel free to make a PR!

#51 has been created. Let's go!