feat: port stroy-bot-projects-binder as binder page

Add the "binder" section (?page=binder&projectId=): links a SharePoint
project to the TNSU API project catalogue by writing UniqueId0/UniqueName
to the "Проекты" list.

The class component is rewritten as function components with hooks while
keeping the legacy behaviour and texts: the same project GET with
odata=nometadata and empty odata-version, MERGE with IF-MATCH * for
bind/unbind (no confirmation), catalogue search with 400 ms debounce and
20-per-page paging, card select/deselect, status colours, ru-RU dates and
HTML-entity decoding of the address. Fluent UI is replaced with ui-kit.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/webparts/stroyBot/pages/binder/DismissibleAlert.tsx

@@ -0,0 +1,21 @@
+import * as React from 'react';
+import { Alert, IconButton } from '@tnsu/ui-kit';
+import styles from './BinderPage.module.scss';
+
+interface Props {
+  variant: 'warn' | 'ok' | 'err' | 'info';
+  dismissLabel: string;
+  onDismiss: () => void;
+  children: React.ReactNode;
+}
+
+// Alert из ui-kit не закрывается, а MessageBar в binder закрывался крестиком — добавляем его рядом.
+// Такой же компонент есть в pages/resources — кандидат на перенос в shared/components.
+export const DismissibleAlert: React.FC<Props> = ({ variant, dismissLabel, onDismiss, children }) => (
+  <div className={styles.dismissibleAlert}>
+    <div className={styles.dismissibleAlertBody}>
+      <Alert variant={variant}>{children}</Alert>
+    </div>
+    <IconButton icon="close" title={dismissLabel} size="sm" onClick={onDismiss} />
+  </div>
+);