[Docs]: Remove extraneous README.md from plugin-structure skill

[sjnims]

Which documentation needs improvement?

Skill documentation

Specific Location

plugins/plugin-dev/skills/plugin-structure/README.md

What's unclear or missing?

The plugin-structure skill contains a README.md file that is not part of the official Claude Code skill structure.

Per the official docs (https://code.claude.com/docs/en/skills.md) and the skill-development skill, a skill directory should contain:

• SKILL.md (required)
• references/ (optional)
• examples/ (optional)
• scripts/ (optional)
• assets/ (optional)

README.md is not a recognized skill component and introduces:

1. Maintenance burden - Contains word counts (e.g., "SKILL.md (1,654 words)") that can drift from actual values
2. Redundancy - Duplicates information already in SKILL.md header and body
3. Non-conformance - Violates the skill specification

Suggested Improvement

Remove the README.md file entirely. The skill's structure, purpose, and trigger conditions are already documented in SKILL.md's frontmatter and body.

rm plugins/plugin-dev/skills/plugin-structure/README.md

Type of issue

• Other (structural issue - file doesn't belong in skill structure)

Additional Context

Found during comprehensive skill review against official Claude Code documentation (skills.md and plugins-reference.md).

[sjnims]

PR submitted: #87