Feature/contract wrapper implicit operator

[BellringerQuinn]

Added a ContractWrapper class that Ownable now inherits from; this abstract class is intended to be used for any contract wrappers we create (note that erc token wrappers and sales contracts also inherit from ContractWrapper as they inherit from Ownable).

Added an implicit operator to Contract and ContractWrapper so that we can use either class, and any derived classes, as an Address directly when appropriate. For example: if we had a function foo(Address contract), we would previously have needed to do foo(myContract.GetAddress()) or foo(myContractWrapper.Contract.GetAddress()) and now we can just do foo(myContract) or foo(myContractWrapper)

Version Increment

Please ensure you have incremented the package version in the package.json as necessary.

• I have incremented the package.json according to semantic versioning
• No version increment is needed; the change does not impact SDK or Sample code/assets

Docs Checklist

Please ensure you have addressed documentation updates if needed as part of this PR:

• I have created a separate PR on the sequence docs repository for documentation updates: Link to docs PR
• No documentation update is needed for this change.

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