Feature Request: Add /reload command to refresh configuration without restarting session

Problem

When editing files in .claude/ (agents, settings, hooks), changes are not reflected until the session is exited and restarted. This creates friction during development:

1. Edit .claude/agents/my-agent.md to fix a frontmatter error
2. Run /doctor - still shows the old error (cached)
3. Must exit session and restart to pick up changes

Proposed Solution

Add a /reload command (or similar: /refresh, /config reload) that re-reads configuration from disk:

• .claude/settings.json
• .claude/settings.local.json
• .claude/agents/*.md
• Hook configurations

Use Cases

1. Fixing agent parse errors - Currently requires full session restart
2. Iterating on hooks - Testing hook changes requires exit/restart cycle
3. Permission updates - Adding new permissions to settings.local.json
4. Agent development - Editing agent prompts and testing immediately

Alternatives Considered

• Exit and restart - Current workaround, but loses conversation context
• Staging directory - Helps with development but still requires restart to test

Additional Context

Discovered while fixing an agent frontmatter error. The fix was applied to disk but /doctor continued reporting the cached (stale) error until session restart.