Add Ouaic plugins

[ouaickaka]

What this PR does

• Plugin names: discipline, methods, and judgment
• Type: remote sources
• Source: https://github.com/ouaickaka/skills.git pinned to dc2f8643e42d98e957a0dbd63974377bc744e632; each entry selects its matching plugins/<name> path
• Homepage: https://github.com/ouaickaka/skills

The three entries preserve Ouaic's failure-mode packaging, allowing each plugin to be installed independently.

Ownership

• I own these plugins and have the right to distribute them.
• The source repo is published under an organization. Ouaic is a personally maintained project published from the author's GitHub account.

Checklist

• Added three related entries to .grok-plugin/marketplace.json; each has a unique kebab-case name.
• Remote sources pin a public, reachable full 40-character lowercase commit SHA.
• Regenerated .grok-plugin/plugin-index.json.
• python3 scripts/validate-catalog.py passes locally.
• python3 scripts/generate-plugin-index.py --check passes locally.
• Homepage and clear descriptions are set.
• Each source plugin declares the MIT license.

Security

• No curl | bash, remote-code download or execution, or postinstall RCE.
• No reading or exfiltration of secrets, tokens, .env, or environment variables.
• The plugins bundle skills only; they contain no hooks or MCP servers.
• Network endpoints: none.
• Credentials or permissions: none.

Notes for reviewers

Ouaic groups agent skills by the failure mode each skill corrects. discipline contains behavioral safeguards, methods contains expert procedures, and judgment contains evaluators for reviews and decisions.