Added localization for ES, IT, DE, AR and FR

Version 1.0.0 — first stable release.

What's new since 0.1.0:

## New

• Upvote / downvote the current post from the slideshow with the ↑ / ↓ keys.
• Download the current image or video, or open the original post, from the overlay.
• More media: Reddit-hosted video now plays with its sound, plus Streamable, Giphy, Catbox, and Imgur albums — alongside Redgifs and Imgur clips; crossposts resolve to the original media.
• Smarter duplicate skipping: a local perceptual hash catches the same image re-uploaded under a new link, not just exact reposts.
• Jump-to-post list and a position counter, with auto-skipped posts dimmed and labeled with the reason.
• A byline under each slide (author, subreddit, source host, and resolution).
• "Open in a window" for AirPlay / Chromecast to a TV.

Improved

• Gap-free slide changes with six transitions; videos and GIFs fill the screen; optional pan & zoom and a top countdown bar.
• More reliable playback across old and new Reddit (direct play with an automatic fallback).
• Accessibility (focus trapping, keyboard, screen-reader labels) plus correctness and security hardening.

Still 100% local: your own logged-in session (no API keys or account), no tracking, no ads, settings stored on your computer.