Add Roo Code context sync: .clinerules symlink and sync script

- Add .clinerules symlink → CLAUDE.md so Roo Code reads same project context
- Add sync-context.sh: copies global context to ~/.claude/ for Claude Code
  and prints content for manual paste into Roo Code Custom Instructions
- Update CLAUDE.md: note .clinerules symlink, add sync-context.sh to file list
- Update CONTEXT.md: add AI context file mapping table, update file structure
- Update README.md: rewrite AI Context Files section to cover both tools,
  document symlink strategy and sync workflow

sync-context.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+# =============================================================
+# Sync global AI context to Claude Code and Roo Code
+#
+# Source of truth: global-claude-md/CLAUDE.md
+#
+# This script:
+#   1. Copies to ~/.claude/CLAUDE.md (Claude Code CLI reads this)
+#   2. Prints content for manual paste into Roo Code Custom Instructions
+# =============================================================
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+SOURCE="$SCRIPT_DIR/global-claude-md/CLAUDE.md"
+
+if [ ! -f "$SOURCE" ]; then
+    echo "[!] Source file not found: $SOURCE"
+    exit 1
+fi
+
+# --- Claude Code CLI ---
+CLAUDE_DIR="$HOME/.claude"
+CLAUDE_TARGET="$CLAUDE_DIR/CLAUDE.md"
+
+mkdir -p "$CLAUDE_DIR"
+cp "$SOURCE" "$CLAUDE_TARGET"
+echo "[✓] Claude Code: copied to $CLAUDE_TARGET"
+
+# --- Roo Code (VS Code) ---
+echo ""
+echo "============================================"
+echo "  Roo Code: Manual Step Required"
+echo "============================================"
+echo ""
+echo "Copy the text between the lines below, then paste it into:"
+echo "  Roo Code sidebar → Settings (gear icon) → Custom Instructions"
+echo ""
+echo "────────────────────────────────────────────"
+cat "$SOURCE"
+echo "────────────────────────────────────────────"
+echo ""
+echo "Done. Both tools are now in sync."