Add C/C++ Binding

[ever0de]

Add C/C++ language binding to improve project usability and adoption. Using the C ABI can provide a compatibility foundation for many other languages.

• implement c binding
• implement c++ binding

Implementation (via Rust FFI):

• Use C ABI.
• Relevant link: https://doc.rust-lang.org/nomicon/ffi.html

[ever0de]

https://github.com/mozilla/cbindgen (.rs => .h)

[ever0de]

https://github.com/dtolnay/cxx

[ever0de]

https://github.com/rust-lang/rust-bindgen (.h => .rs)

[ever0de]

https://github.com/mozilla/cbindgen/blob/master/docs.md#cbindgentoml