feat(ui): Add feature flag system (#208)

ui/src/hooks/useFeatureFlag.ts

@@ -0,0 +1,15 @@
+import { useContext } from "react";
+import { FeatureFlagContext } from "../providers/FeatureFlagProvider";
+
+export const useFeatureFlag = (minAppVersion: string) => {
+  const context = useContext(FeatureFlagContext);
+
+  if (!context) {
+    throw new Error("useFeatureFlag must be used within a FeatureFlagProvider");
+  }
+
+  const { isFeatureEnabled, appVersion } = context;
+
+  const isEnabled = isFeatureEnabled(minAppVersion);
+  return { isEnabled, appVersion };
+};