feat: modify release script to update mcpb versions in server.json

[rubenbaraut]

This pull request enhances the release automation script by adding support for updating MCPB package metadata with versioned URLs and SHA256 file hashes in server.json. The most important changes are grouped below:

Security and Package Metadata Automation:

• Added a calculateSHA256 function to compute and log the SHA256 hash of MCPB package files, improving file integrity verification.
• Automated the update of MCPB package entries in server.json to include new versioned identifier URLs and their corresponding SHA256 hashes during the release process.

Dependency Updates:

• Imported the createHash method from the crypto module to enable SHA256 hash calculation.