feat: add Valkey power for Redis/Valkey integration

[edlng]

Summary

Adds Valkey power to enable direct interaction with Valkey/Redis instances from Kiro. Developers can execute commands, manage data structures, and administer servers without leaving the IDE.

Motivation

Valkey/Redis is widely used for caching, session management, message queuing, and real-time data processing. Having direct access to Valkey instances from Kiro streamlines development workflows by eliminating context switching between the IDE and separate Redis CLI tools. This is particularly useful for:

• Debugging cache issues during development
• Inspecting session data and application state
• Testing pub/sub messaging patterns
• Managing development and staging Redis instances
• Quick data exploration and manipulation

The power supports various deployment scenarios including local development, remote instances with authentication, SSL/TLS connections, and cluster mode - making it suitable for both development and production troubleshooting.

Verifications

• Added valkey/POWER.md with comprehensive documentation
• Added valkey/mcp.json with default configuration
• Updated README.md with Valkey entry
• Included configuration examples (local, remote, SSL/TLS, cluster)
• Added example prompts for common use cases
• Included troubleshooting section
• Tested with local Valkey instance with SSL, Cluster, default standalone configs
• Tested basic commands (PING, SET, GET)
• Verified MCP server connection

[nadetastic]

Hi @edlng please use this form to submit a power - https://kiro.dev/powers/submit/