* seal: Copy over a legacy version of pallet_contracts from substrate

* seal: Fix substrate dependency pathes and add as dependency to runtime

* seal: Adapt pallet to current substrate version

* seal: Add contracts pallet to runtime

* seal: Implement rpc runtime api

* seal: Update to latest rpc output format

* seal: Replace child trie by prefix trie

* seal: Add contracts endpoint to the client

* seal: fixup rpc test

* Fix whitespace issue

Co-authored-by: Sergei Shulepov <[email protected]>

* seal: Move pallet out of the runtime directory

* seal: Create a seperate runtime for contracts

* Move parachains to top level directory

* seal: Disable rent for easier testing

Co-authored-by: Sergei Shulepov <[email protected]>

* Fix block announce

* Fix compilation

* Update to latest Substrate & Polkadot

* Replace --unsafe-rpc-export with --unsafe-rpc-external

* Add --rpc-methods=Unsafe

Documented in substrate 24486f52929e9e518eeccbc6ad6da70e9e5bdf8a

* typos

* more typo

* fixed rpc expose

* Disable the integration test

Co-authored-by: Cecile Tonglet <[email protected]>

* Start fixing compilation errors

* Switch to git version of `WasmBuilder`

* Fix compilation

* More updates

* Adapt to latest Substrate/Polkadot changes