Eliminate .bak file backups from edit, docs, lint, testgen, and agent commands to simplify safety features, relying on previews and confirmations instead. Update README, architecture docs, troubleshooting, and TODOs to reflect changes. Adjust tests to remove backup assertions.
- Renamed todo/queued/scaffold.md to todo/completed/scaffold.md to indicate task completion.
- Added todo/queued/interactive-agent.md with details for the next priority feature: a persistent conversational agent mode for Grokkit.
