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.component.ts

@@ -0,0 +1,24 @@
+import { ChangeDetectionStrategy, Component, Input } from '@angular/core';
+import { Params } from '@angular/router';
+import { UiLinkButtonType } from './link-button-type.enum';
+
+@Component({
+  selector: 'ui-link-button',
+  templateUrl: './link-button.component.html',
+  styleUrls: ['./link-button.component.scss'],
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class LinkButtonComponent {
+  private readonly _defaultClass = 'ui-link-button';
+  @Input() uiType: UiLinkButtonType = UiLinkButtonType.PRIMARY;
+  @Input() uiSize: 's' | 'm' = 'm';
+  @Input() uiRouterLink: string | string[];
+  @Input() uiQueryParams: Params = null;
+
+  get linkButtonClass(): string {
+    if (this.uiType) {
+      return `${this._defaultClass} ${this._defaultClass}--${this.uiType as string}`;
+    }
+    return this._defaultClass;
+  }
+}