feat: encrypt one of the shares using gcp kms module and store it in db

[rahulbarmann]

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Feat: encrypt one of the shares using gcp kms module and store it in db

I have encrypted one of the shares using GCP KMS module and store that encrypted share into the database for the user. This video demonstrates the complete workflow of splitting the private key and encrypting all 3 shares using AES-256, AWS, and GCP during the user's account creation.

https://github.com/user-attachments/assets/9a15798d-9c7c-44e2-9d90-341e3b825dfc

🛠️ Type of Change

• [ ] 🐛 Bug fix
• [x] ✨ New feature
• [ ] 🚨 Breaking change
• [ ] 📚 Documentation update

✅ Checklist

To ensure a smooth review process, please check off each item as you complete it:

• [x] Code Style: My code adheres to the project’s style guidelines.
• [x] Self-Review: I have reviewed my own code and made improvements.
• [x] Comments: I’ve added comments to explain complex or non-obvious parts of the code.
• [x] Documentation: I’ve updated the documentation to reflect my changes.
• [x] Warnings: My changes introduce no new warnings.
• [x] Tests: I’ve added tests to verify that my changes work as expected.
• [x] Passes Locally: All new and existing unit tests pass on my local machine.

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[cb7chaitanya]

Merging, good work @rahulbarmann