feat: add logo image and RTL support styles

- Added logo image to assets.
- Implemented RTL support styles in rtlSupport.scss for various components including breadcrumb, datatable, and tree node toggle button.

chore: configure environment files for production, staging, and development

- Created environment.prod.ts for production settings.
- Created environment.staging.ts for staging settings.
- Created environment.ts for local development settings.

feat: define custom theme preset

- Added presets.ts to define a custom theme preset using PrimeUIX with specific component styles and semantic colors.

chore: set up proxy configuration for local development

src/app/core/services/fake-api.service.ts

@@ -0,0 +1,27 @@
+import { Injectable } from '@angular/core';
+import { Observable, of, throwError } from 'rxjs';
+import { delay } from 'rxjs/operators';
+
+@Injectable({ providedIn: 'root' })
+export class FakeApiService {
+  /**
+   * Simulate a GET request
+   */
+  get<T>(data: T, ms: number = 500): Observable<T> {
+    return of(data).pipe(delay(ms));
+  }
+
+  /**
+   * Simulate a POST request
+   */
+  post<T>(data: T, ms: number = 500): Observable<T> {
+    return of(data).pipe(delay(ms));
+  }
+
+  /**
+   * Simulate an error response
+   */
+  error<T>(message: string, ms: number = 500): Observable<T> {
+    return throwError(() => new Error(message)).pipe(delay(ms));
+  }
+}