feat(ui): Added link-button to ui-libs. (TV-855)

Squashed commit of the following:

commit 1aab96d7f243c77adbd806196f76b931f4445976
Author: Erik Tiekstra <erik.tiekstra@arbetsformedlingen.se>
Date:   Thu Oct 28 11:38:05 2021 +0200

    Added digi-link component to ui lib

libs/ui/link-button/link-button.module.ts

@@ -0,0 +1,12 @@
+import { CommonModule } from '@angular/common';
+import { CUSTOM_ELEMENTS_SCHEMA, NgModule } from '@angular/core';
+import { RouterModule } from '@angular/router';
+import { LinkButtonComponent } from './link-button.component';
+
+@NgModule({
+  schemas: [CUSTOM_ELEMENTS_SCHEMA],
+  declarations: [LinkButtonComponent],
+  imports: [CommonModule, RouterModule],
+  exports: [LinkButtonComponent],
+})
+export class UiLinkButtonModule {}