feat: adaptive font size

src/utils/index.ts

@@ -1 +1,2 @@
 export * from './request';
+export * from './responsive-font';

src/utils/responsive-font.ts

@@ -0,0 +1,4 @@
+import { PixelRatio } from 'react-native';
+
+const fontScale = PixelRatio.getFontScale();
+export const getFontSize = (size: number) => size / fontScale;