Add Paperless Finance Report Tool - Complete implementation

A Python CLI tool for generating financial reports from Paperless-ngx:

- Phase 1 (MVP): Config handling, Paperless API client with auth and
  pagination, custom fields extraction, tag-based summation, CLI output
- Phase 2 (Grouping): Multiple grouping criteria (tag, correspondent,
  category, payment type, month, quarter, year), percentage distribution
- Phase 3 (Reports): HTML reports with Chart.js diagrams (doughnut, bar,
  line charts), PDF export via WeasyPrint, JSON and CSV export
- Phase 4 (Comfort): Automatic tag ID resolution, disk caching with
  diskcache, colorized logging, comprehensive error handling

Features:
- Flexible date filtering (year, month, date range)
- Period comparison with change analysis
- Swiss franc formatting (CHF with apostrophe separators)
- Interactive HTML reports with sortable tables and document links
- Multiple output formats (CLI, HTML, PDF, JSON, CSV)

paperless-report/requirements.txt

@@ -0,0 +1,31 @@
+# Paperless Finance Report Tool - Dependencies
+
+# HTTP Client
+requests>=2.31.0
+
+# CLI Framework
+click>=8.1.7
+
+# Configuration
+pyyaml>=6.0.1
+
+# HTML Templating
+jinja2>=3.1.2
+
+# PDF Generation
+weasyprint>=60.1
+
+# Data Processing
+python-dateutil>=2.8.2
+
+# Caching
+diskcache>=5.6.3
+
+# Logging (colorized output)
+colorlog>=6.8.0
+
+# Progress bars
+tqdm>=4.66.1
+
+# Table formatting for CLI
+tabulate>=0.9.0