feat(pos): add shop and statistics modules with components, services, and routing

- Implemented shop module with root component, loading state, and invoice handling.
- Created statistics module with invoice type card component, API routes, and data models.
- Added season picker component for selecting year and season.
- Integrated services for fetching statistics data and managing state.
- Established routing for statistics and shop views.

src/app/domains/pos/modules/statistics/views/root.component.html

@@ -0,0 +1,57 @@
+<div class="flex flex-col gap-6 p-4">
+  <season-picker (onChange)="onDateChanged($event)" />
+  <div class="grid grid-cols-2 gap-4">
+    @if (loading()) {
+      @for (_ of [0, 1, 2, 3, 4, 5]; track $index) {
+        <div class="h-32 w-full">
+          <p-skeleton width="100%" height="100%"></p-skeleton>
+        </div>
+      }
+    } @else {
+      <pos-statistics-invoice-type-card
+        type="all"
+        [loading]="loading()"
+        [totalAmount]="item()?.all?.total_amount"
+        [totalTaxAmount]="item()?.all?.total_tax"
+        [count]="item()?.all?.count"
+        (onClick)="toInvoicesPage('all')" />
+      <pos-statistics-invoice-type-card
+        type="success"
+        [loading]="loading()"
+        [totalAmount]="item()?.success?.total_amount"
+        [totalTaxAmount]="item()?.success?.total_tax"
+        [count]="item()?.success?.count"
+        (onClick)="toInvoicesPage('success')" />
+      <pos-statistics-invoice-type-card
+        type="failure"
+        [loading]="loading()"
+        [totalAmount]="item()?.failure?.total_amount"
+        [totalTaxAmount]="item()?.failure?.total_tax"
+        [count]="item()?.failure?.count"
+        (onClick)="toInvoicesPage('failure')" />
+      <pos-statistics-invoice-type-card
+        type="notSended"
+        [loading]="loading()"
+        [totalAmount]="item()?.notSended?.total_amount"
+        [totalTaxAmount]="item()?.notSended?.total_tax"
+        [count]="item()?.notSended?.count"
+        (onClick)="toInvoicesPage('notSended')" />
+      <pos-statistics-invoice-type-card
+        type="pending"
+        [loading]="loading()"
+        [totalAmount]="item()?.pending?.total_amount"
+        [totalTaxAmount]="item()?.pending?.total_tax"
+        [count]="item()?.pending?.count"
+        (onClick)="toInvoicesPage('pending')" />
+      <pos-statistics-invoice-type-card
+        type="credit"
+        [loading]="loading()"
+        [totalAmount]="item()?.credit?.total_amount"
+        [totalTaxAmount]="item()?.credit?.total_tax"
+        [count]="item()?.credit?.count" />
+    }
+  </div>
+  <div class="fixed inset-x-0 bottom-0 p-4">
+    <button pButton [routerLink]="shopRoute" size="large" class="w-full">ایجاد صورت‌حساب جدید</button>
+  </div>
+</div>