feat: add add-role component (#494)

Fixes: #487

src/app/system/roles-and-permissions/add-role/add-role.component.html

@@ -0,0 +1,40 @@
+<div class="container">
+
+  <mat-card>
+
+    <form [formGroup]="roleForm" (ngSubmit)="submit()">
+
+      <mat-card-content>
+
+        <div fxLayout="column">
+
+          <mat-form-field>
+            <mat-label>Name</mat-label>
+            <input matInput required formControlName="name">
+            <mat-error *ngIf="roleForm.controls.name.hasError('required')">
+              Role Name is <strong>required</strong>
+            </mat-error>
+          </mat-form-field>
+
+          <mat-form-field>
+            <mat-label>Description</mat-label>
+            <textarea matInput required formControlName="description"></textarea>
+            <mat-error *ngIf="roleForm.controls.description.hasError('required')">
+              Role Description is <strong>required</strong>
+            </mat-error>
+          </mat-form-field>
+
+        </div>
+
+        </mat-card-content>
+
+        <mat-card-actions fxLayout="row" fxLayout.xs="column" fxLayoutAlign="center" fxLayoutGap="5px">
+          <button type="button" mat-raised-button [routerLink]="['../']">Cancel</button>
+          <button mat-raised-button color="primary" [disabled]="!roleForm.valid">Submit</button>
+        </mat-card-actions>
+
+      </form>
+
+    </mat-card>
+
+</div>