feat: add Master Admin application functionality

src/app/core/services/context/tenant-context.service.ts

@@ -0,0 +1,22 @@
+import { HttpClient } from '@angular/common/http';
+import { Injectable, inject, signal } from '@angular/core';
+import { Observable, tap } from 'rxjs';
+import { TenantContext } from '../../models/context/context.model';
+
+@Injectable({ providedIn: 'root' })
+export class TenantContextService {
+  private readonly http = inject(HttpClient);
+  readonly tenantContext = signal<TenantContext | null>(null);
+
+  loadTenantContext(): Observable<TenantContext> {
+    return this.http.get<TenantContext>(``).pipe(
+      tap((context) => {
+        this.tenantContext.set(context);
+      })
+    );
+  }
+
+  clear(): void {
+    this.tenantContext.set(null);
+  }
+}