feat: add saving-deposit and withdrawal page (#389)

- Add Savings Module.
- Add saving-account-actions component.
- Add savings-account-transactions component.
- Add savings-routing.module.ts
- Add savings-transaction-template.resolver.ts

Fixes: #249

src/app/savings/savings.service.ts

@@ -0,0 +1,34 @@
+/** Angular Imports */
+import { Injectable } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+
+/** rxjs Imports */
+import { Observable } from 'rxjs';
+
+/**
+ * Savings Service.
+ */
+@Injectable({
+  providedIn: 'root'
+})
+export class SavingsService {
+
+  constructor(private http: HttpClient) { }
+  /**
+   * @param {string} savingAccountId is saving account's Id.
+   * @returns {Observable<any>}
+   */
+  getSavingsTransactionTemplateResource(savingAccountId: string): Observable<any> {
+    return this.http.get(`/savingsaccounts/${savingAccountId}/transactions/template`);
+  }
+
+  /**
+   * @param {string} action transaction type.
+   * @param {string} savingAccountId saving account id.
+   * @param {any} transactionData transaction details for saving account.
+   * @returns {Observable<any>}
+   */
+  makeTransaction(action: string, savingAccountId: string, transactionData: any): Observable<any> {
+    return this.http.post(`/savingsaccounts/${savingAccountId}/transactions?command=${action}`, transactionData);
+  }
+}