feat(challenge23): test harnesses

apps/testing-harness/src/styles.scss

@@ -0,0 +1,28 @@
+@use '@angular/material' as mat;
+
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+/* You can add global styles to this file, and also import other style files */
+
+@include mat.core();
+
+$theme-primary: mat.define-palette(mat.$indigo-palette);
+$theme-accent: mat.define-palette(mat.$pink-palette, A200, A100, A400);
+
+$theme-warn: mat.define-palette(mat.$red-palette);
+
+$theme: mat.define-light-theme(
+  (
+    color: (
+      primary: $theme-primary,
+      accent: $theme-accent,
+      warn: $theme-warn,
+    ),
+    typography: mat.define-typography-config(),
+  )
+);
+
+@include mat.dialog-theme($theme);
+@include mat.all-component-themes($theme);