fix(example app): resolve deprecation warnings and TypeScript errors

[theianmay]

Motivation

This PR addresses deprecation warnings and TypeScript errors in the example app to provide cleaner, more maintainable reference code for developers using react-native-elements.

Issues fixed:

• Deprecation warnings for outdated Ionicons v5 icon names (ios-* prefixes)
• Deprecation warnings for React Native's built-in SafeAreaView
• Warning about setLayoutAnimationEnabledExperimental being a no-op in New Architecture
• TypeScript errors in login screen components related to ref typing and validation logic

Since the example app serves as reference code that developers can copy, we want to avoid propagating deprecated patterns.

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• Jest Unit Test
• Checked with example app (tested on Expo Go Android emulator)
• Verified all deprecation warnings are resolved
• Verified TypeScript compilation passes without errors
• Confirmed layout and spacing remain correct after SafeAreaView changes
• Tested login screen validation and animations still work correctly

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• New and existing unit tests pass locally with my changes

Additional context

Changes summary:

Icon updates:

• Updated 15 Ionicons from v5 (ios-*) to v6 universal names in settings.tsx
• Updated AntDesign icon from "rocket1" to "rocket" in header.tsx

SafeAreaView migration:

• Migrated from deprecated react-native SafeAreaView to react-native-safe-area-context
• Added proper edges prop configuration to maintain correct spacing
• Updated in [whatsappClone.tsx], [profile.tsx], and [image.tsx]

Layout animation fix:

• Added conditional check for setLayoutAnimationEnabledExperimental to only run on Android old architecture
• Prevents no-op warning in New Architecture while maintaining compatibility

TypeScript improvements:

• Fixed ref types in login screens to allow shake() and focus() methods
• Separated validation logic from UI side effects for cleaner code
• Fixed in [screen2.tsx] and [screen3.tsx]

Package metadata:

• Updated keywords in @rneui/themed package.json for better NPM discoverability

All changes maintain backward compatibility and improve code quality without affecting functionality.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.13%. Comparing base (81edead) to head (a1b6bc7).
⚠️ Report is 14 commits behind head on next.

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #3995      +/-   ##
==========================================
+ Coverage   79.11%   79.13%   +0.01%     
==========================================
  Files          90       90              
  Lines        2140     2142       +2     
  Branches      945      959      +14     
==========================================
+ Hits         1693     1695       +2     
  Misses        444      444              
  Partials        3        3              

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