Create the asset_id.sw file and move AssetId out of contract_id.sw

[bitzoic]

Description

This PR removes the AssetId type from the contract_id.sw file and into the new asset_id.sw file for better composability and navigation of the standard library.

This PR causes breaking changes as the transfer() and mint_to() functions from Address, ContractId, and Identity have been removed due to circular dependencies. This was originally added in this PR to give developers a familiarity from solidity. It has been heavily debated whether this should be kept in the standard library as it adds complexity and duplicates the existing transfer() and mint_to() functions. For the sake of simplicity and ensuring likeness between all asset management functions, especially in audits, this has been removed.

Checklist

• I have linked to any relevant issues.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation where relevant (API docs, the reference, and the Sway book).
• I have added tests that prove my fix is effective or that my feature works.
• I have added (or requested a maintainer to add) the necessary Breaking* or New Feature labels where relevant.
• I have done my best to ensure that my PR adheres to the Fuel Labs Code Review Standards.
• I have requested a review from the relevant team or maintainers.