Add MLS by HansonXyz plugin for MLS Grid API integration

Features:
- Full sync of NorthStar MLS properties via MLS Grid API v2
- Incremental sync using ModificationTimestamp
- Local media download and storage
- Rate limit compliance (2 req/sec, 7200/hr, 40000/day)
- Sync state tracking with resume capability
- WP-CLI commands: test, sync, status, stats, cache
- Admin settings page with manual sync triggers
- Public API functions: mls_get_properties, mls_get_property, etc.

Database tables:
- mls_properties: Listing data with full field mapping
- mls_media: Downloaded images
- mls_sync_state: Sync progress tracking
- mls_rate_limits: API usage tracking
- mls_sync_log: Debug logging

Documentation:
- docs/CLAUDE.md: AI development guide
- docs/API.md: MLS Grid API reference
- docs/USAGE.md: User documentation

Tested: Connection, auth, sync 10 records, media download verified

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

wp-content/plugins/mls-by-hansonxyz/uninstall.php

@@ -0,0 +1,48 @@
+<?php
+/**
+ * Uninstall MLS by HansonXyz Plugin
+ *
+ * This file runs when the plugin is deleted via the WordPress admin.
+ * It removes all plugin data including database tables and options.
+ */
+
+// Exit if not called by WordPress
+if (!defined('WP_UNINSTALL_PLUGIN')) {
+    exit;
+}
+
+global $wpdb;
+
+// Delete options
+delete_option('mls_plugin_options');
+delete_option('mls_db_version');
+delete_option('mls_activated_at');
+
+// Drop tables
+$tables = array(
+    $wpdb->prefix . 'mls_properties',
+    $wpdb->prefix . 'mls_media',
+    $wpdb->prefix . 'mls_sync_state',
+    $wpdb->prefix . 'mls_rate_limits',
+    $wpdb->prefix . 'mls_sync_log',
+);
+
+foreach ($tables as $table) {
+    $wpdb->query("DROP TABLE IF EXISTS {$table}");
+}
+
+// Clear scheduled cron events
+wp_clear_scheduled_hook('mls_sync_properties');
+wp_clear_scheduled_hook('mls_sync_media');
+wp_clear_scheduled_hook('mls_cleanup');
+
+// Optionally delete media files
+// Note: Uncomment this if you want to delete all downloaded media on uninstall
+/*
+$upload_dir = wp_upload_dir();
+$mls_dir = $upload_dir['basedir'] . '/mls-listings';
+
+if (is_dir($mls_dir)) {
+    // Recursive delete would go here
+}
+*/