Add onboarding screen + token check

app/explore/category.tsx

@@ -1,65 +0,0 @@
-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,
-  },
-})