Hedera-sdk-py

Added
- add `decimal` field to `TokenRelationship` class

Changed
- `AccountBalanceQuery`, `AccountInfoQuery`, and `ContractInfoQuery` get part of the data from the Mirror Node REST API (HIP-367)
- improved documentation in repository
- updated protobufs

Fixed
- undeprecate `AccountBalance.tokens`, `AccountBalance.tokenDecimals`, `AccountInfo.tokenRelationships`, `ContractInfo.tokenRelationships`


Deprecated
- `TokenRelationship.symbol`, use `TokenInfo.symbol` instead
- `AccountId.populateAccountNumAsync`, use `AccountId.populateAccountNum` instead
- `AccountId.populateAccountEvmAddressAsync`, use `AccountId.populateAccountEvmAddress` instead
- `ContractId.populateContractNumAsync`, use `ContractId.populateContractNum` instead

Added
- METADATA key and possibility to update NFT metadata (HIP-657)
- Fungible Token Metadata Field (HIP-646)
- NFT Collection Token Metadata Field (HIP-765)
- a method to calculate the recoveryId for ECDSA signatures

Changed
- improved documentation in repository
- updated protobufs

Added
- METADATA key and possibility to update NFT metadata (HIP-657)
- Fungible Token Metadata Field (HIP-646)
- NFT Collection Token Metadata Field (HIP-765)

Changed
- improved documentation in repository
- updated protobufs

Added
- possibility to optionally send transaction data without required transaction fields (HIP-745)

Added
- `signerNonce` field to `ContractFunctionResult` (HIP-844)

Fixed
- removed `streamsupport` dependency