Add LoopTroop as an open-source alternative to Devin, Cursor, and Claude Code

Following CONTRIBUTING_TO_OSB.md, I would like to submit LoopTroop as an open-source alternative to Devin, Cursor, and Claude Code.

Add open source alternative to Devin, Cursor, and Claude Code:
- Name: LoopTroop
- Repository: https://github.com/looptroop-ai/LoopTroop
- Website: https://www.looptroop.ovh/
- Description: Open-source local GUI orchestrator for AI coding agents.
- Similarity Score: 85
- Category: Development Tools
- Features: LLM Council planning, atomic Beads in isolated git worktrees, fresh-context Ralph retries, local visual review dashboard.
- Notes: Unlike IDE plugins or single-file chat CLI tools, LoopTroop is a local-first orchestration GUI for multi-file coding tickets. It runs background execution with OpenCode agents and provides structured human review before merging.

Disclosure: Submitting on behalf of the LoopTroop project.

Start by reading CONTRIBUTING_TO_OSB.md and inspecting how existing Development Tools alternatives are recorded. Add LoopTroop's name, repository, website, description, similarity score, category, features, and notes, then verify the new listing is formatted consistently.

Written by the indexing model from the issue text.