feat: add license and update reamdes of all packages

[tutods]

Pull request

Description

On this pull request, I'm:

• Adding license files;
• Update documentation on README files.

Motivation and Context

References

Types of changes

• Breaking change (a fix or feature that would cause existing functionality to change)
• Bugfix (a non-breaking change that fixes an issue)
• Chore (a task that doesn't add or fix existing code or tests)
• New feature (a non-breaking change that adds functionality)
• Performance (a non-breaking change that reduces time or space complexity of a flow)
• Refactor (a non-breaking change that restructures existing code)
• Test (added or updated existing tests without implementation changes)