Add Tree Ring Memory to Memory Frameworks

[TerminallyLazy]

Summary

• Add Tree Ring Memory to the framework comparison table.
• Add a Memory Frameworks & Libraries entry for the Rust-native local-first CLI and SQLite/FTS lifecycle layer.

Validation

• Verified Tree Ring is not already listed in this repository.
• Checked the GitHub link returns HTTP 200.
• Ran git diff --check successfully.