Migrate material components

Frontend/src/styles.scss

@@ -1,3 +1,24 @@
+@use "@angular/material" as mat;
+
+@include mat.core();
+
+$my-app-primary: mat.define-palette(mat.$indigo-palette);
+$my-app-accent: mat.define-palette(mat.$pink-palette, A200, A100, A400);
+$my-app-warn: mat.define-palette(mat.$red-palette);
+
+$my-app-theme: mat.define-light-theme(
+  (
+    color: (
+      primary: $my-app-primary,
+      accent: $my-app-accent,
+      warn: $my-app-warn,
+    ),
+  )
+);
+
+@include mat.all-component-themes($my-app-theme);
+
+
 html, body { height: 100%; }
 body { margin: 0; font-family: Roboto, "Helvetica Neue", sans-serif; }