feat(proto): add buf labels for ibc-go release tags

[VolodymyrBg]

Description

This PR adds support for publishing Protocol Buffer definitions to the Buf Schema Registry with appropriate labels whenever a new IBC-Go release tag is created. This allows consumers of our Protobuf API to depend on specific tagged versions, ensuring API stability in their projects.

Changes include:

• Updated GitHub workflow to trigger on tag creation with pattern 'v*..'
• Added configuration to push buf schemas with labels that include the tag name
• Updated documentation to explain how to use tagged versions in dependencies
• Added information about the Buf Schema Registry to README

closes: #8070

#8070

Checklist

• Targeted PR against the correct branch.
• Linked to GitHub issue with discussion and accepted design.
• Code follows the module structure standards and Go style guide.
• Updated relevant documentation (docs/).
• Added relevant godoc comments.
• Provide a conventional commit message to follow the repository standards.
• Include a descriptive changelog entry.
• Re-reviewed Files changed in the GitHub PR explorer.
• Review SonarCloud Report in the comment section below once CI passes.