atrium-xrpc-client-v0.1.0

feat: Add xrpc-client package (#63)

* Add xrpc-client implementation

* Add README, doc tests and comments

* Add workflows

* Fix root Cargo.toml

* Oops...

* Add tests

* Fix tests

* Add tests

* Use atrium-xrpc 0.5, rename methods

* Add docs

* Ready to publish