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>

hooks/session-start-superpowers.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+# Session Start Hook - Auto-inject superpowers context
+# This hook runs on every session start/resume
+# Trigger: session-start
+
+# Check if AUTO_SUPERPOWERS is enabled
+if [ "${AUTO_SUPERPOWERS:-false}" = "true" ]; then
+    # Inject superpowers context into the session
+    if [ -f "$HOME/.claude/skills/using-superpowers/skill.md" ]; then
+        cat "$HOME/.claude/skills/using-superpowers/skill.md"
+    fi
+fi
+
+exit 0