✨ feat: create auth provider context

shared/contexts/AuthContext.tsx

@@ -0,0 +1,14 @@
+import { createContext, useContext } from "react";
+import { UserSession } from "../models/auth/validateAndDecodeJWT";
+
+type AuthContextType = {
+  session: UserSession | null;
+};
+
+export const AuthContext = createContext<AuthContextType>({
+  session: null,
+});
+
+export function useAuth() {
+  return useContext(AuthContext);
+}