Precache Function for Cached Videos

[mgulbazilyas]

Overview:
This pull request introduces a new feature that enables precaching videos without requiring immediate playback. The precache function downloads and stores videos locally, allowing offline access later without an internet connection.

Key Features:

• Added a precacheVideo(String url) method to cache videos in advance.
• Supports monitoring caching progress and handles errors gracefully.
• Ensures compatibility with existing caching mechanisms of the cached_video_player_plus plugin.

Use Case:

• Applications with a list of videos that need to be available offline.
• Reduces buffering time during playback by preloading video content.
• Ideal for scenarios where users may have limited or no internet connectivity after initial caching.

Testing Details:

• Tested with multiple video URLs to ensure caching functionality.
• Verified offline playback of cached videos after precaching.
• Handled edge cases, including network interruptions during caching.

Benefits:

• Enhanced user experience with faster and smoother video playback.
• Reliable offline video access for preloaded content.
• Flexible integration with apps requiring preloaded media content.

Notes for Reviewers:

• Code implementation follows plugin standards for caching and performance.
• Suggestions for optimization or additional features are welcome.

Thanks for reviewing this pull request!