feat/bls-key-separation

[wnjoon]

Description

This PR separates the BLS key and FilePV key that were previously merged into one in WrappedFilePV. Specifically:

• In WrappedFilePV, two separated structures for ed25519 and bls are included.
• CometPV, wrapping FilePV in cometbft, is used for handling DelegatorAddress.
• BlsPV is used for handling BLS key and encrypting its data to ERC2335 type using password and vice versa.
• Since separation, WrappedFilePV methods are changed or removed. Most of all, a password is needed for handling BLS to convert ERC2355 type. When initializing the network, BLS password is required and it is also saved to a file lik other key files.

[wnjoon]

@dongsam
Both fixing related codes and processing unit tests are still ongoing. It will be completed by other commits.

[wnjoon]

@dongsam

Here is what I've changed until commit b31a889

• Separation WrappedFilePV structure including CometPvKey and BlsPvKey
• Encrypt BlsPvKey to ERC2335 standard when saving it to the file
• Save password to file when initializing network using babylond init
• Create random password when there is no file including password
• Decrypt ERC2335 to BlsPVKey with password
• Add custom InitCmd including BLS related codes

When running babylond init, check if bls-key and bls-password files are created inside ~/.babylond/config

[dongsam]

Please prepare a PR ensuring all the following contribution docs and below bullet points are satisfied:

1. Update changelog.
2. Sync with the main branch and rebase.
3. Clean up the commit history to keep it concise, ideally under 5 commits.
4. Enhance the description to include:
   • Details about the changes introduced in this PR.
   • features that will be addressed in the subsequent PR.
   • Provide reproduction scripts and example key files applicable after the changes are implemented.
5. Ensure CI passes successfully.
6. Resolve all review comments