feat: initial commit - Supervisor UI with Next.js 16 and Tailwind CSS 4

- Modern web interface for Supervisor process management
- Built with Next.js 16 (App Router) and Tailwind CSS 4
- Full XML-RPC client implementation for Supervisor API
- Real-time process monitoring with auto-refresh
- Process control: start, stop, restart operations
- Modern dashboard with system status and statistics
- Dark/light theme with OKLCH color system
- Docker multi-stage build with runtime env var configuration
- Gitea CI/CD workflow for automated builds
- Comprehensive documentation (README, IMPLEMENTATION, DEPLOYMENT)

Features:
- Backend proxy pattern for secure API communication
- React Query for state management and caching
- TypeScript strict mode with Zod validation
- Responsive design with mobile support
- Health check endpoint for monitoring
- Non-root user security in Docker

Environment Variables:
- SUPERVISOR_HOST, SUPERVISOR_PORT
- SUPERVISOR_USERNAME, SUPERVISOR_PASSWORD (optional)
- Configurable at build-time and runtime

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

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

.gitattributes

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+# Auto detect text files and perform LF normalization
+* text=auto
+
+# Source code
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+# Shell scripts
+*.sh text eol=lf
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+# Docker
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+*.dockerignore text eol=lf
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+# Config files
+*.yml text eol=lf
+*.yaml text eol=lf
+*.toml text eol=lf
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+*.env text eol=lf
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+# Documentation
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+README* text eol=lf
+
+# Archives
+*.zip binary
+*.tar binary
+*.gz binary
+
+# Images
+*.jpg binary
+*.jpeg binary
+*.png binary
+*.gif binary
+*.ico binary
+*.svg text eol=lf
+*.webp binary
+
+# Fonts
+*.woff binary
+*.woff2 binary
+*.ttf binary
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+*.eot binary