Integrate rendering v2.0

[rggdmonk]

Summary

font_download                        # new module
├── __init__.py
├── README.md                        # how to use
├── reproducible_font_download.py    # main logic
├── reproducible_fonts               # store default downloadble fonts
│   ├── honk.py
│   └── noto_sans.py
├── test_font_download               # tests
│   ├── conftest.py
│   ├── test_font_download.py
│   ├── test_integration.py
│   └── test_tools.py
└── tools.py

It's updated version for sign/WeLT#26

1. Add interface
   • Download fonts from config or pattern
   • Create config for font downloads
2. Tests
3. Demos

demos
├── font_download
│   └── demo_create_font_download_configs.py
├── pixel_renderer
│   └── demo_render_text_image.py
└── README.md

Breaking change

• remove dpi parameter