Add RedisVL Python skill to redis/agent-skills

Summary

Add a RedisVL Python skill package to Redis' official agent-skills repository.

Level: Intermediate

Current State

• Redis maintains an official agent-skills repo, but no RedisVL-specific Python skill exists yet.
• RedisVL usage patterns are repeated in docs/issues and are good candidates for reusable agent guidance.

Proposed Change

• Add a RedisVL Python skill package in redis/agent-skills:
  • schema design and validation guidance
  • query composition patterns (vector/filter/hybrid)
  • sync/async usage conventions
  • safe index lifecycle and operational patterns
  • troubleshooting playbook
• Include concise, copyable examples aligned with current RedisVL best practices.

Definition of Done

• New RedisVL skill is committed and documented in redis/agent-skills.
• Skill includes practical patterns/snippets (at least 8).
• Skill passes that repo's validation/build workflow.

Out of Scope

• Building a new plugin framework or changing existing skill packaging design.

Review the existing skill packaging and validation/build workflow in redis/agent-skills first. Then organize the requested RedisVL guidance into a documented skill with at least eight practical patterns covering schemas, queries, sync/async usage, index operations, and troubleshooting; completion means it is committed, documented, and passes that repository's validation workflow.