Create Macro for Implementing `SlotRange` (#2788)

* Macro for generating `SlotRange`

* remove test code

* refactor slots into crate

* add no_std flag

* finish macro

* make compile

* fix copyright date

* don't assume lease periods per slot

* Update runtime/common/Cargo.toml

* Apply suggestions from code review

Co-authored-by: Guillaume Thiolliere <[email protected]>

* fixes

* Update lib.rs

* tests

* Move consts into struct

* docs

* fix compile

* Apply suggestions from code review

Co-authored-by: Bastian Köcher <[email protected]>

* Update Cargo.lock

* Update runtime/common/src/slot_range.rs

Co-authored-by: Bastian Köcher <[email protected]>

* Apply suggestions from code review

Co-authored-by: Bastian Köcher <[email protected]>

* fixes

Co-authored-by: Guillaume Thiolliere <[email protected]>
Co-authored-by: Bastian Köcher <[email protected]>