Restructure docs and assets, update metadata

Moved documentation files to the docs/ directory and assets to assets/. Updated pyproject.toml to reference docs/README.md and changed version to 1.0.0. Added new optional development dependencies. Updated requirements.txt to match dev dependencies. Renamed and relocated example and screenshot files. Updated main.py metadata to reflect new version and project structure.

Author: ukr-projects

CONTRIBUTING.md

@@ -0,0 +1,48 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [1.0.0] - 2025-06-11
+
+### Added
+- 🎉 **Initial release** with core download and UI functionality  
+- ✅ **Video Upscaling** support via frame‑by‑frame Real‑ESRGAN + FFmpeg reassembly  
+- ✅ **Multi‑threaded** batch processing with real‑time progress bars  
+- ✅ **Advanced Settings** dialog: model selection, GPU toggle, tile size, FPS & quality  
+- ✅ **Comprehensive Logging** system with save/load capability  
+- ✅ **Drag‑and‑Drop** interface enhancements  
+
+### Security
+- Added SECURITY.md
+
+---
+
+## Guidelines for Contributors
+
+When adding entries to this changelog:
+
+1. **Group changes** by type using the categories above
+2. **Write for humans** - use clear, descriptive language
+3. **Include issue/PR numbers** when relevant: `Fixed login bug (#123)`
+4. **Date format** should be YYYY-MM-DD
+5. **Version format** should follow [Semantic Versioning](https://semver.org/)
+6. **Keep entries concise** but informative
+
+### Version Number Guidelines
+- **Major** (X.y.z) - Breaking changes
+- **Minor** (x.Y.z) - New features, backwards compatible
+- **Patch** (x.y.Z) - Bug fixes, backwards compatible
+
+### Example Entry Format
+```markdown
+## [1.2.3] - 2024-01-15
+
+### Added
+- New feature description (#PR-number)
+
+### Fixed
+- Bug fix description (fixes #issue-number)
+```

README.md

@@ -40,7 +40,7 @@ Examples of unacceptable behavior include:
 
 Community leaders are responsible for clarifying and enforcing our standards and
 will take appropriate and fair corrective action in response to any behavior that
-they deem inappropriate, threatening,offensive, or harmful.
+they deem inappropriate, threatening, offensive, or harmful.
 
 Community leaders have the right and responsibility to remove, edit, or reject
 comments, commits, code, wiki edits, issues, and other contributions that are