Complete PDF Sort and Merge Flask Application

- Full-featured web application for PDF processing
- Microsoft Entra (Azure AD) authentication with PKCE
- Parallel PDF sorting and merging capabilities
- Job management system with real-time progress tracking
- Modern web UI with responsive design
- Comprehensive error handling and logging
- Ubuntu installation script for easy deployment
- Environment configuration for secure credential management

.gitignore

@@ -0,0 +1,41 @@
+# Environment variables
+.env
+
+# Python
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+.Python
+env/
+venv/
+.venv/
+pip-log.txt
+pip-delete-this-directory.txt
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.log
+.git
+.mypy_cache
+.pytest_cache
+.hypothesis
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Application specific
+results/
+status.txt
+jobs.json