fix: Bypasses WASM add_with_plutus_witness bug for RegisterStake cert…

[Temasar1]

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This PR Bypasses WASM add_with_plutus_witness bug for RegisterStake certificates.

Under the hood in sidan-lab/whisky (core_csl.rs), the add_cert() method unconditionally passes all ScriptCertificate objects to add_with_plutus_witness(). Because RegisterStake lacks a script witness natively, this triggers:

[Error - CoreCSL - add_cert - add_with_plutus_witness]: Your certificate does not have a required script witness. Please use .add instead.

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Summary

Please provide a brief, concise summary of the changes in your pull request. Explain the problem you are trying to solve and the solution you have implemented.

This safely forces the WebAssembly logic to fall into the Certificate::BasicCertificate matching, bypassing the witness validation check exactly as intended and resolving the transaction generation crash securely.

Affect components

Please indicate which part of the Mesh Repo

• @meshsdk/common
• @meshsdk/contract
• @meshsdk/core
• [✅ ] @meshsdk/core-csl
• @meshsdk/core-cst
• @meshsdk/hydra
• @meshsdk/provider
• @meshsdk/react
• @meshsdk/svelte
• @meshsdk/transaction
• @meshsdk/wallet
• Mesh playground (i.e. https://meshjs.dev/)
• Mesh CLI

Type of Change

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• [ ✅] New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [✅ ] Bug fix (non-breaking change which fixes an issue)
• Code refactoring (improving code quality without changing its behavior)
• Documentation update (adding or updating documentation related to the project)

Related Issues

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• [✅ ] My code is appropriately commented and includes relevant documentation, if necessary
• [ ✅] I have added tests to cover my changes, if necessary
• I have updated the documentation, if necessary
• [ ✅] All new and existing tests pass (i.e. npm run test)
• The build is pass (i.e. npm run build)

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