feat: add server-side pagination, sort and search to groups component (#507)

- Add server-side pagination, sort and search to groups component
- Refactor code to conform to current guidelines

See: #234

src/app/groups/groups.module.ts

@@ -1,23 +1,29 @@
-import { NgModule,  CUSTOM_ELEMENTS_SCHEMA  } from '@angular/core';
-import { CommonModule } from '@angular/common';
-import { CoreModule } from '../core/core.module';
-import { MatTableModule } from '@angular/material/table';
-import { FlexLayoutModule } from '@angular/flex-layout';
+/** Angular Imports */
+import { NgModule } from '@angular/core';
+import { DatePipe } from '@angular/common';
 
+/** Custom Modules */
+import { GroupsRoutingModule } from './groups-routing.module';
+import { SharedModule } from 'app/shared/shared.module';
+import { PipesModule } from '../pipes/pipes.module';
+
+/** Custom Components */
 import { GroupsComponent } from './groups.component';
-import { GroupsRoutingModule } from 'app/groups/groups-routing.module';
-import { GroupsService } from './groups.service';
+
+/**
+ * Groups Module
+ *
+ * All components related to Groups should be declared here.
+ */
 @NgModule({
   imports: [
-    CommonModule,
+    SharedModule,
     GroupsRoutingModule,
-    CoreModule,
-    MatTableModule,
-    FlexLayoutModule
+    PipesModule
   ],
-  declarations: [GroupsComponent],
-  schemas: [
-    CUSTOM_ELEMENTS_SCHEMA
-  ]
+  declarations: [
+    GroupsComponent
+  ],
+  providers: [DatePipe]
 })
 export class GroupsModule { }