Add Prettier configuration and refactor code for consistent formatting

- Introduced a .prettierrc file to standardize code formatting.
- Updated import statements and JSX attributes in NotFoundScreen, HomeScreen, PlayScreen, and PlayerControls for consistent use of double quotes.
- Refactored styles in various components to use double quotes for string values.
- Added SeekingBar component to enhance video playback experience.

app/+not-found.tsx

@@ -1,13 +1,14 @@
-import {Link, Stack} from 'expo-router';
-import {StyleSheet} from 'react-native';
+import { Link, Stack } from "expo-router";
+import { StyleSheet } from "react-native";
 
-import {ThemedText} from '@/components/ThemedText';
-import {ThemedView} from '@/components/ThemedView';
+import { ThemedText } from "@/components/ThemedText";
+import { ThemedView } from "@/components/ThemedView";
+import React from "react";
 
 export default function NotFoundScreen() {
   return (
     <>
-      <Stack.Screen options={{title: 'Oops!'}} />
+      <Stack.Screen options={{ title: "Oops!" }} />
       <ThemedView style={styles.container}>
         <ThemedText type="title">This screen doesn't exist.</ThemedText>
         <Link href="/" style={styles.link}>
@@ -21,8 +22,8 @@ export default function NotFoundScreen() {
 const styles = StyleSheet.create({
   container: {
     flex: 1,
-    alignItems: 'center',
-    justifyContent: 'center',
+    alignItems: "center",
+    justifyContent: "center",
     padding: 20,
   },
   link: {