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>

commands/write-plan.md

@@ -0,0 +1,40 @@
+# /write-plan
+
+Create implementation plans from requirements or specifications.
+
+## Usage
+
+```
+/write-plan "Add user authentication with OAuth"
+```
+
+## Description
+
+Creates detailed, step-by-step implementation plans including:
+- Technical approach
+- File changes needed
+- Testing strategy
+- Dependencies
+- Risks and mitigations
+
+## Plan Structure
+
+1. **Summary** - High-level overview
+2. **Technical Approach** - Architecture decisions
+3. **Implementation Steps** - Ordered task list
+4. **Files to Create/Modify** - Specific files
+5. **Testing Strategy** - Validation approach
+6. **Dependencies** - Required packages/changes
+7. **Risks & Mitigations** - Potential issues
+
+## Examples
+
+```
+/write-plan "Implement Stripe subscriptions"
+/write-plan "Add real-time notifications with WebSockets"
+/write-plan "Migrate from REST to GraphQL"
+```
+
+## Output
+
+Saves plan to `.claude/plans/` directory for later execution with `/execute-plan`.