docs: Add WP-CLI helper script and comprehensive usage guide

wp-cli-helper.sh

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+#!/bin/bash
+# WP-CLI Helper for Local WP
+# Usage: ./wp-cli-helper.sh [wp command]
+# Example: ./wp-cli-helper.sh option delete wnw_nav_tree
+
+# Local WP WordPress path
+WP_PATH="/Users/dwindown/Local Sites/woonoow/app/public"
+
+# Run WP-CLI with correct path
+wp "$@" --path="$WP_PATH"