feat: initial WooDoo plugin – WooCommerce & Odoo 19 integration

- Odoo JSON-RPC client (no Composer, uses wp_remote_post)
- Admin settings page under WooCommerce with connection test
- Customer linking: search Odoo partners from WP user profile
- My Account: Odoo Invoices tab with PDF proxy download
- My Account: Book a Meeting tab (slot calculator + calendar.event)
- WC order → Odoo sale.order auto-sync on processing status
- Products matched by SKU; partner auto-created from billing info
- Uninstall cleanup (options, user meta, order meta, DB table)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

assets/css/woodoo-admin.css

@@ -0,0 +1,26 @@
+/* WooDoo Admin Styles */
+.woodoo-settings .nav-tab-wrapper { margin-bottom: 0; }
+.woodoo-settings .woodoo-tab { padding: 20px 0; }
+.woodoo-info-box {
+    background: #fff8e1;
+    border: 1px solid #ffe082;
+    border-radius: 4px;
+    padding: 12px 16px;
+    margin-top: 16px;
+    font-size: .875rem;
+    max-width: 760px;
+}
+.woodoo-info-box ul { margin: .5rem 0 0 1.2rem; }
+.woodoo-info-box li { margin-bottom: 4px; }
+.woodoo-customer-linker { margin-bottom: 1.5rem; }
+.woodoo-customer-linker label { display: block; margin-bottom: 6px; font-weight: 600; }
+#woo-customer-results { margin-top: 10px; }
+.woodoo-badge {
+    display: inline-block;
+    padding: 3px 10px;
+    border-radius: 999px;
+    font-size: .75rem;
+    font-weight: 600;
+}
+.woodoo-badge--green { background: #d1fae5; color: #065f46; }
+.woodoo-badge--red   { background: #fee2e2; color: #991b1b; }