feat: add components for external services (#376)

- Add sms and edit-sms component
- Add notification and edit-notification component
- Add email and edit-email component
- Add amazon-s3 and edit-amazon-s3 component

Fixes: #182 and Fixes: #183

src/app/system/external-services/email/email.component.ts

@@ -0,0 +1,51 @@
+/** Angular Imports */
+import { Component, OnInit, ViewChild } from '@angular/core';
+import { ActivatedRoute } from '@angular/router';
+import { MatTableDataSource, MatSort } from '@angular/material';
+
+/**
+ * Email Configuration Component.
+ */
+@Component({
+  selector: 'mifosx-email',
+  templateUrl: './email.component.html',
+  styleUrls: ['./email.component.scss']
+})
+export class EmailComponent implements OnInit {
+
+  /** Email configuration data. */
+  emailConfigurationData: any;
+  /** Columns to be displayed in Email configuration table. */
+  displayedColumns: string[] = ['name', 'value'];
+  /** Data source for Email configuration table. */
+  dataSource: MatTableDataSource<any>;
+
+  /** Sorter for Email configuration table. */
+  @ViewChild(MatSort) sort: MatSort;
+
+  /**
+   * Retrieves the Email configuration data from `resolve`.
+   * @param {ActivatedRoute} route Activated Route.
+   */
+  constructor(private route: ActivatedRoute) {
+    this.route.data.subscribe((data: { emailConfiguration: any }) => {
+      this.emailConfigurationData = data.emailConfiguration;
+    });
+  }
+
+  /**
+   * Sets the Email Configuration table.
+   */
+  ngOnInit() {
+    this.setEmailConfiguration();
+  }
+
+  /**
+   * Initializes the data source and sorter for Email configuration table.
+   */
+  setEmailConfiguration() {
+    this.dataSource = new MatTableDataSource(this.emailConfigurationData);
+    this.dataSource.sort = this.sort;
+  }
+
+}