feat: Auto-generate commands/ from user-invocable skills during build

[yonatangross]

Summary

Workaround for Claude Code bug where skills with user-invocable: true in skills/*/SKILL.md aren't discovered as slash commands. CC only looks for commands in commands/*.md.

Related CC Bug: anthropics/claude-code#20802

Problem

• OrchestKit has 22 skills marked user-invocable: true in their SKILL.md frontmatter
• These should be callable via /ork:skill-name
• But CC doesn't discover them - it only looks in commands/ directory

Solution

Enhance the build script to auto-generate commands/*.md from skills with user-invocable: true:

# After copying skills, generate commands/
mkdir -p "$PLUGIN_DIR/commands"
for skill_md in "$PLUGIN_DIR/skills"/*/SKILL.md; do
    if grep -q "user-invocable: true" "$skill_md"; then
        skill_name=$(dirname "$skill_md" | xargs basename)
        # Generate command file with skill content
        generate_command "$skill_md" > "$PLUGIN_DIR/commands/$skill_name.md"
    fi
done

Benefits

• Single source of truth stays in src/skills/
• Each plugin auto-gets commands for its included skills
• Consistent with existing multi-plugin architecture
• Easy to remove when CC fixes the upstream bug

Tasks

• Add generate_commands function to scripts/build-plugins.sh
• Generate command files with proper frontmatter (description, allowed-tools)
• Include skill content in command file
• Test with all 34 plugins
• Update CHANGELOG

Affected Files

• scripts/build-plugins.sh
• plugins/*/commands/*.md (generated)