v1.1.0-root

Add data root field inside header extrinsic root (#74)

* add: data_root field inside extrinsic_root

* add: ext decoding and data root computation

* add: RPC call for querying data proof

* fix: RPC proof generation

* fix: missing code after cherry pick

* fix: subxt config

* rebase develop

* rebase develop

* add hash

Co-authored-by: Kailas <kailaskr05@gmail.com>