* Transition getter functions to not use scratch buffer
* Remove scratch buffer from ext_get_storage
* Remove scratch buffer from ext_call
* Remove scratch buffer from ext_instantiate
* Add ext_input and remove scratch buffer
* Rework error handling (changes RPC exposed data)
* ext_return passes a flags field instead of a return code
* Flags is only for seal and not for the caller
* flags: u32 replaced status_code: u8 in RPC exposed type
* API functions use a unified error type (ReturnCode)
* ext_transfer now traps on error to be consistent with call and instantiate
* Remove the no longer used `Dispatched` event
* Updated inline documentation
* Prevent skipping of copying the output for getter API
* Return gas_consumed from the RPC contracts call interface
* Updated COMPLEXTITY.md
* Rename ext_gas_price to ext_weight_to_fee
* Align comments with spaces
* Removed no longer used `ExecError`
* Remove possible panic in `from_typed_value`
* Use a struct as associated data for SpecialTrap::Return
* Fix nits in COMPLEXITY.md
* Renamed SpecialTrap to TrapReason
* Fix test
* Finish renaming special_trap -> trap_reason
* Remove no longer used get_runtime_storage
* fixup! Remove no longer used get_runtime_storage
* Removed tabs for comment aligment
Alexander Theißen