* [chores] Fix typo: invokation ➜ invocation

* [chores] Fix typo: timstamp ➜ timestamp

* [chores] Fix typo: ininitialized ➜ initialized

* [env] Implement terminate_contract in off-chain env

* [examples] Add lock-until

* [env] Implement proper off-chain testing for ext_terminate

* Apply suggestions from code review

Co-authored-by: Hero Bird <robin.freyler@gmail.com>

* [env] Fix Environment type

* [env] Derive Balance/AccountId from Environment

* [env] Fix types in macro

* [examples] Remove lock-until

* [examples] Add contract-terminate

* [examples] Add contract-transfer

* [examples] Make clippy happy

* [examples] Fix example name

* [examples] Remove Default impls

* [examples] Move macro to contract-terminate/test_utils

* [env] Migrate macro to fn which gets Environment type param

* [env] Add explanatory dev comment

* [examples] Allow clippy::new_without_default

Co-authored-by: Hero Bird <robin.freyler@gmail.com>