feat static pages system with dynamic footer and safe html rendering

src/app/pages/static-page/static-page.component.html

@@ -0,0 +1,18 @@
+<main class="static-page page-container">
+  @if (loading()) {
+    <section class="static-page__state">{{ 'app.connecting' | translate }}</section>
+  } @else if (notFound()) {
+    <section class="static-page__state">
+      <h1>404</h1>
+      <p>Страница не найдена</p>
+      <a [routerLink]="'/' | langRoute">На главную</a>
+    </section>
+  } @else {
+    <article class="static-page__content">
+      @if (title()) {
+        <h1>{{ title() }}</h1>
+      }
+      <div class="static-page__html" [innerHTML]="safeHtml()"></div>
+    </article>
+  }
+</main>