refactor(breadcrumb): relocate Breadcrumb slice from entities to features

Breadcrumb is not a business aggregate — it is a scroll-tracking navigation
capability (NavigationWrapper registers page sections into a store), so it
belongs in the features layer, not entities. Move the whole slice and
repoint its three widget consumers. entities/ now holds only Font, a true
aggregate.

src/features/Breadcrumb/index.ts

@@ -8,7 +8,7 @@
  * @example
  * ```svelte
  * <script lang="ts">
- *   import { scrollBreadcrumbsStore } from '$entities/Breadcrumb';
+ *   import { scrollBreadcrumbsStore } from '$features/Breadcrumb';
  *   import { onMount } from 'svelte';
  *
  *   onMount(() => {

src/features/Breadcrumb/model/store/scrollBreadcrumbsStore.svelte.ts

@@ -15,7 +15,7 @@
  * @example
  * ```svelte
  * <script lang="ts">
- *   import { scrollBreadcrumbsStore } from '$entities/Breadcrumb';
+ *   import { scrollBreadcrumbsStore } from '$features/Breadcrumb';
  *
  *   onMount(() => {
  *     scrollBreadcrumbsStore.add({

src/widgets/ComparisonView/ui/ComparisonView/ComparisonView.svelte

@@ -4,7 +4,7 @@
     Owns all shared state and wires the pieces together.
 -->
 <script lang="ts">
-import { NavigationWrapper } from '$entities/Breadcrumb';
+import { NavigationWrapper } from '$features/Breadcrumb';
 import type { ResponsiveManager } from '$shared/lib';
 import { SidebarContainer } from '$shared/ui';
 import {

src/widgets/FontSearch/ui/FontSearchSection/FontSearchSection.svelte

@@ -3,7 +3,7 @@
     Wraps FontSearch with a Section component
 -->
 <script lang="ts">
-import { NavigationWrapper } from '$entities/Breadcrumb';
+import { NavigationWrapper } from '$features/Breadcrumb';
 import type { ResponsiveManager } from '$shared/lib';
 import { cn } from '$shared/lib';
 import { Section } from '$shared/ui';

src/widgets/SampleList/ui/SampleListSection/SampleListSection.svelte

@@ -3,8 +3,8 @@
     Wraps SampleList with a Section component
 -->
 <script lang="ts">
-import { NavigationWrapper } from '$entities/Breadcrumb';
 import { fontCatalogStore } from '$entities/Font';
+import { NavigationWrapper } from '$features/Breadcrumb';
 import type { ResponsiveManager } from '$shared/lib';
 import { cn } from '$shared/lib';
 import {