feat: added pages, forms, and functionality.

ui_mockup/src/settings/theme.ts

@@ -0,0 +1,19 @@
+import { Theme, Container } from './types';
+
+const injectedTheme: string = '%INJECTED_THEME%';
+const injectedContainer: string = '%INJECTED_CONTAINER%';
+
+let theme: Theme = 'light';
+let container: Container = 'none';
+
+if (injectedTheme === 'light' || injectedTheme === 'dark') {
+  theme = injectedTheme;
+}
+if (injectedContainer === 'centered' || injectedContainer === 'none') {
+  container = injectedContainer;
+}
+
+export default {
+  theme,
+  container,
+};