Add missing repository components for complete supercharge.sh installation

Added all directories and files expected by supercharge.sh:

- hooks/ (5 hook scripts for session management and AI consultation)
- commands/ (3 custom slash commands: brainstorm, write-plan, execute-plan)
- plugins/ (plugin references for glm-plan, rust-analyzer, marketplaces)
- bin/ralphloop (Ralph Orchestrator wrapper for autonomous iteration)
- scripts/sync-agents.sh (agent synchronization script)
- templates/ (config templates: settings, hooks, config.json)

This completes the repository structure so supercharge.sh can install
all components without warnings.

Co-Authored-By: Claude <noreply@anthropic.com>

plugins/README.md

@@ -0,0 +1,30 @@
+# Plugins Directory
+
+This directory contains plugin references and configurations for Claude Code.
+
+## Plugin Categories
+
+### Agent Plugins
+- `agent-browse` - Web browsing capabilities for agents
+- `claude-delegator` - Task delegation system
+
+### UI/UX Plugins
+- `claude-hud` - Heads-up display for Claude Code
+- `frontend-design` - Frontend design tools
+
+### Safety Plugins
+- `claude-code-safety-net` - Safety validation layer
+
+### Marketplace
+- `marketplaces` - Plugin marketplace references
+
+## Installation
+
+Plugins are referenced here and installed via:
+```bash
+npm install <plugin-name>
+```
+
+## Configuration
+
+Plugin settings go in `~/.claude/settings.json` under `plugins` section.