[Docs]: Fix incorrect allowed-tools syntax in plugin-settings skill

[sjnims]

Which documentation needs improvement?

Skill documentation

Specific Location

• plugins/plugin-dev/skills/plugin-settings/SKILL.md (line 105)
• plugins/plugin-dev/skills/plugin-settings/examples/create-settings-command.md (line 3)

What's unclear or missing?

The allowed-tools frontmatter field uses incorrect JSON array syntax instead of the official comma-separated string format.

Current (incorrect):

# SKILL.md line 105
allowed-tools: ["Read", "Bash"]

# examples/create-settings-command.md line 3
allowed-tools: ["Write", "AskUserQuestion"]

Per official docs:

allowed-tools: Read, Grep, Glob

Suggested Improvement

Change from JSON array syntax to comma-separated string format:

File	Current	Should Be
SKILL.md:105	allowed-tools: ["Read", "Bash"]	allowed-tools: Read, Bash
examples/create-settings-command.md:3	allowed-tools: ["Write", "AskUserQuestion"]	allowed-tools: Write, AskUserQuestion

Type of issue

• Incorrect information

Additional Context

Per official Claude Code documentation:

• https://code.claude.com/docs/en/skills.md
• https://code.claude.com/docs/en/plugins-reference.md

Both sources show allowed-tools using comma-separated string format, not JSON arrays.

Found during comprehensive skill review against official documentation.

[sjnims]

PR submitted: #83