* contracts: Make use of existing type aliases for runtime API types

* contracts: Refactor the contracts call runtime API

* review: Fix comment typo

Co-authored-by: Andrew Jones <ascjones@gmail.com>

* Update frame/contracts/common/src/lib.rs

Co-authored-by: Nikolay Volf <nikvolf@gmail.com>

* Update frame/contracts/common/src/lib.rs

Co-authored-by: Nikolay Volf <nikvolf@gmail.com>

* Update frame/contracts/common/src/lib.rs

Co-authored-by: Nikolay Volf <nikvolf@gmail.com>

* Update frame/contracts/common/src/lib.rs

Co-authored-by: Nikolay Volf <nikvolf@gmail.com>

* Update frame/contracts/common/src/lib.rs

Co-authored-by: Nikolay Volf <nikvolf@gmail.com>

* Update lib.rs

* review: Group crate imports

Co-authored-by: Andrew Jones <ascjones@gmail.com>
Co-authored-by: Addie Wagenknecht <addie@nortd.com>
Co-authored-by: Nikolay Volf <nikvolf@gmail.com>