feat(common): add default color scheme

libs/common/src/lib/config.ts

@@ -2,6 +2,8 @@ import { AssetClass, AssetSubClass, DataSource, Type } from '@prisma/client';
 import { JobOptions, JobStatus } from 'bull';
 import ms from 'ms';
 
+import { ColorScheme } from './types';
+
 export const ghostfolioPrefix = 'GF';
 export const ghostfolioScraperApiSymbolPrefix = `_${ghostfolioPrefix}_`;
 export const ghostfolioFearAndGreedIndexDataSourceCryptocurrencies =
@@ -77,6 +79,7 @@ export const PORTFOLIO_SNAPSHOT_COMPUTATION_QUEUE_PRIORITY_LOW =
 
 export const STATISTICS_GATHERING_QUEUE = 'STATISTICS_GATHERING_QUEUE';
 
+export const DEFAULT_COLOR_SCHEME: ColorScheme = 'DARK';
 export const DEFAULT_CURRENCY = 'USD';
 export const DEFAULT_DATE_FORMAT_MONTH_YEAR = 'MMM yyyy';
 export const DEFAULT_HOST = '0.0.0.0';