feat: add base class for settings listing

src/app/components/settings-base-list/settings-base-list.html

@@ -0,0 +1,2 @@
+<app-simple-list-w-actions [items]="(data$|async) ?? []" (action)="edit($event)"/>
+<app-floating-big-btn icon="add" (bigClick)="add()"/>

src/app/components/settings-base-list/settings-base-list.scss

@@ -0,0 +1,5 @@
+:host {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+}

src/app/components/settings-base-list/settings-base-list.ts

@@ -0,0 +1,9 @@
+import { Observable } from 'rxjs';
+import { SimpleListItem } from '../simple-list-w-actions/SimpleListItem';
+
+export abstract class SettingsBaseList {
+  abstract data$: Observable<SimpleListItem[]>;
+  
+  protected abstract edit(action: { action: string; subject: string }): void;
+  protected abstract add(): void;
+}