Add support for pure python tools and native tools

[pombredanne]

Some directions:

• Extract source symbols and strings using Pygments #399
• Extract source symbols and strings using https://tree-sitter.github.io/ #400
• Add new pipeline for secrets scancode.io#787
• https://lief.re/ (for ELF/Mach-O/PE symbols)
• https://github.com/AlDanial/cloc (for Cloc)
• some tool for Android (dedexing of classes.dex)
• some tool for Windows PE symbols (Windows)
• some tools for Mach-O symbols (macOS)

[armijnhemel]

related: aboutcode-org/vulnerablecode#711