Batch Photo Upload: Support for Up to Four Images at Once

Implement functionality that enables users to upload up to four photographs simultaneously when creating a post on Adrenaline Realm.

This feature supports the selection and concurrent upload of multiple images during post composition. It allows users to present more comprehensive visual content in a single post, including varied angles, detailed close-ups, contextual views, or sequential documentation. The capability streamlines the posting process, eliminates the need for successive uploads or external links, improves workflow efficiency, and promotes richer, higher-quality contributions that enhance community discussions and sharing.