/manifest

Generate or update plugin.json from discovered components

# Generate Plugin Manifest

Generate or update the plugin.json manifest for the plugin at: $ARGUMENTS

## Discovery Process

### 1. Scan for Skills
Pattern: `skills/*/SKILL.md`

For each skill found:
- Extract `name` from frontmatter
- Extract `description` from frontmatter
- Note the skill path

### 2. Scan for Commands
Pattern: `commands/**/*.md`

For each command found:
- Extract `description` from frontmatter
- Note the command path
- Determine namespace from directory structure

### 3. Scan for Agents
Pattern: `agents/*.md`

For each agent found:
- Extract `name` from frontmatter
- Ext...