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/toast.service.ts

@@ -0,0 +1,39 @@
+import { Injectable } from '@angular/core';
+import { MessageService, ToastMessageOptions } from 'primeng/api';
+
+interface IToast extends Pick<ToastMessageOptions, 'sticky' | 'life'> {
+  title?: string;
+  text: string;
+}
+
+@Injectable({
+  providedIn: 'root',
+})
+export class ToastService {
+  constructor(private messageService: MessageService) {}
+
+  add(message: ToastMessageOptions) {
+    if (!message.detail) return;
+    this.messageService.add(message);
+  }
+
+  info(message: IToast) {
+    const { title = 'اطلاع', text } = message;
+    this.add({ ...message, summary: title, detail: text, severity: 'info' });
+  }
+
+  success(message: IToast) {
+    const { title = 'موفقیت', text } = message;
+    this.add({ ...message, summary: title, detail: text, severity: 'success' });
+  }
+
+  warn(message: IToast) {
+    const { title = 'هشدار', text } = message;
+    this.add({ ...message, summary: title, detail: text, severity: 'warn' });
+  }
+
+  error(message: IToast) {
+    const { title = 'خطا', text } = message;
+    this.add({ ...message, summary: title, detail: text, severity: 'error' });
+  }
+}