File Converter Pro

# What's New in v1.0.7

## Converter

- **Engine-based mixin architecture** – the converter was split into independent per-format mixins (RTF, PPTX, EPUB, HTML, PDF, Office COM) with a centralized dispatch table and shared `ConversionResult` helpers.
- **Word to PDF options** – image compression and metadata stripping when converting Word documents to PDF.
- **RTF to PDF** – native RTF rendering with underline, color, and table support.
- **PPTX to PDF** – native PowerPoint to PDF rendering via python-pptx.
- **EPUB to PDF** – EPUB rendering with pandoc and a native fallback chain.
- **HTML to PDF** – HTML rendering with resource inlining.
- **Office COM to PDF** – direct Word/Excel/PowerPoint to PDF via COM automation.
- **LibreOffice fallback for PDF to DOCX** – if the native engine fails, LibreOffice is tried as a second engine.
- **PDF to HTML** – new conversion type using PyMuPDF dict-mode rendering.
- **Multi-engine fallback chain** – document conversions now try multiple engines in sequence (native, LibreOffice, COM) and fall through on failure.

## Compression

- **7-Zip replaces WinRAR** – file compression now uses 7-Zip for ZIP splitting and 7Z format sup