feat: initial implementation of Real-ESRGAN Web UI

Full-featured Gradio 6.0+ web interface for Real-ESRGAN image/video
upscaling, optimized for RTX 4090 (24GB VRAM).

Features:
- Image upscaling with before/after comparison (ImageSlider)
- Video upscaling with progress tracking and checkpoint/resume
- Face enhancement via GFPGAN integration
- Multiple codecs: H.264, H.265, AV1 (with NVENC support)
- Batch processing queue with SQLite persistence
- Processing history gallery
- Custom dark theme
- Auto-download of model weights

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

pyproject.toml

@@ -0,0 +1,18 @@
+[project]
+name = "upscale-ui"
+version = "0.1.0"
+description = "Real-ESRGAN Web UI for image and video upscaling"
+readme = "README.md"
+requires-python = ">=3.10"
+license = {text = "MIT"}
+
+[tool.setuptools]
+packages = ["src"]
+
+[tool.ruff]
+line-length = 100
+target-version = "py310"
+
+[tool.ruff.lint]
+select = ["E", "F", "W", "I"]
+ignore = ["E501"]