Add onboarding screen + token check

app/(explore)/category.tsx

@@ -0,0 +1,65 @@
+import {
+  SafeAreaView,
+  ScrollView,
+  StyleSheet,
+  Dimensions
+} from 'react-native';
+
+import {useEffect, useState} from 'react';
+import RenderHtml from 'react-native-render-html';
+import {useNavigation} from '@react-navigation/native';
+import AsyncStorage from '@react-native-async-storage/async-storage';
+
+import {Colors} from '@/constants/Colors';
+import {useColorScheme} from '@/hooks/useColorScheme';
+import {ThemedView} from '@/components/ThemedView';
+
+export default function CategoryScreen() {
+  const colorScheme = useColorScheme() ?? 'light';
+  const navigation = useNavigation();
+  const [description, setDescription] = useState('');
+
+  // Load item from storage
+  useEffect(() => {
+    AsyncStorage.getItem('activeCategory').then((data) => {
+      const itemData: any = JSON.parse(data ?? '{}');
+
+      if (itemData != null) {
+        const {name, description} = itemData;
+
+        // Set description
+        // @ts-ignore
+        setDescription(description);
+
+        // Set page title
+        navigation.setOptions({title: name});
+      }
+    });
+  }, []);
+
+  // HTML render props
+  const source = {html: description};
+  const width = Dimensions.get('window').width;
+
+  return (
+    <SafeAreaView style={{flex: 1, backgroundColor: Colors[colorScheme].background,}}>
+      <ScrollView style={styles.container}>
+        <ThemedView style={styles.htmlContainer}>
+          <RenderHtml
+            contentWidth={width}
+            source={source}
+          />
+        </ThemedView>
+      </ScrollView>
+    </SafeAreaView>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: {
+    padding: 25,
+  },
+  htmlContainer: {
+    paddingBottom: 50,
+  },
+})