Add context and hooks (#41200)

types/react-with-styles/OTHER_FILES.txt

@@ -1 +1,3 @@
-lib/ThemedStyleSheet.d.ts
+lib/ThemedStyleSheet.d.ts
+lib/WithStylesContext.d.ts
+lib/hooks/useStyles.d.ts

types/react-with-styles/lib/WithStylesContext.d.ts

@@ -0,0 +1,4 @@
+import { Context } from "react";
+
+declare const context: Context<{ stylesInterface: any, stylesTheme: any }>;
+export default context;

types/react-with-styles/lib/hooks/useStyles.d.ts

@@ -0,0 +1,8 @@
+import { Styles } from "../../index";
+
+declare function useStyles<TStyles extends Styles>({ stylesFn }: { stylesFn: (...args: any[]) => TStyles }): {
+  css: Function;
+  styles: TStyles;
+}
+
+export default useStyles;