adds color themeing support to the site

src/app/interfaces/station-config.ts

@@ -23,4 +23,18 @@ export interface StationConfig {
   play_store_icon_url: string;
   play_store_url: string;
   app_store_embed_html: string;
+  // Color theme
+  color_primary: string;
+  color_primary_light: string;
+  color_primary_dark: string;
+  color_primary_muted: string;
+  color_accent: string;
+  color_accent_light: string;
+  color_accent_dark: string;
+  color_accent_muted: string;
+  color_background: string;
+  color_text: string;
+  color_success: string;
+  color_danger: string;
+  color_info: string;
 }