Add ralph-kit to Standalone Implementations

[develo-pera]

Summary

Adds ralph-kit to the Standalone Implementations section.

ralph-kit is a CLI that provides:

• Conversational project definition — an interactive /ralph-kit:define slash command that generates PROMPT.md, AGENT.md, specs, and fix_plan.md through a guided questionnaire.
• Local Kanban dashboard (ralph-kit board) — visualizes Backlog / To Do / In Progress / Blocked / Done by reading the same Markdown control files Ralph reads. Drag-and-drop promotes backlog items into the active plan. Live log panel streams loop output.
• Loop runner (ralph-kit run) — auto-detects your project layout and delegates to the existing runner (e.g. scripts/ralph/ralph.sh), falls back to a built-in loop when none exists. Writes status.json and live.log so the board updates in real time.
• Cross-implementation — works with any Ralph Loop setup. It ships flavors for the built-in loop, frankbria/ralph-claude-code, and snarktank/ralph, and detects layouts via declaration (.ralph-kit.json), fingerprint, or heuristics.

Checklist

• Searched existing entries — ralph-kit is not already listed
• Individual PR for a single addition
• Uses the required format: [Resource Name](link) - Description.
• Description is concise and ends with a period
• Spelling and grammar checked
• No trailing whitespace