Add Tree Ring Memory

[TerminallyLazy]

Summary

Adds Tree Ring Memory to the Database tools table as a free local-first memory lifecycle layer for AI agents.

I maintain Tree Ring Memory. This entry is scoped as agent memory/database infrastructure, not a standalone assistant.

Validation

• Checked README for existing Tree Ring / TerminallyLazy entries: none found.
• Checked open and closed PRs/issues for existing Tree Ring submissions: none found.
• Verified the linked repository returns HTTP 200.
• Ran git diff --check.
• Ran a current local CLI smoke in an isolated directory: tree-ring init, remember --json, recall --json, and forget --json --reason.