Port to C++

[cjxgm]

Fancy status (Rust version) has the following modules:

• Main: parses command line and call other modules.
• Fastup Parser: Parse fastup text to a Document object.
• Color System: Color representation and perceptually-linear operators.
• Document Model
  • Text
  • Bold
  • Foreground Color
  • Background Color
  • Widget
• Builtin Widgets
  • time
  • cpu
  • mem
  • net
  • gradient
• Builtin Renderers
  • ansi
  • tmux
  • html
  • dump
• Builtin Outputs
  • stdout
• Statistics: Gather system information.
• Unit Tests

The new C++ version will have these modules:

• prelude: A minimum set of tools to replace the standard library, which is so small that it will be automatically #include-ed to every single compilation unit.
• config: Command-line argument parsing and storage.
  • parse cmdline.
  • help and version info.
• fastup: Parse Fastup documents to token trees.
• renderer: Convert token trees to strings.
  • registry.
  • renderer dump.
  • renderer tty.
  • renderer tmux.
  • renderer html.
• collect: A d-bus service and client to provide data to the widgets.
• widget: Opinionated visualizations.
  • color utilities.
  • registry.
  • widget <gradient>.
  • widget <time>.
  • widget <cpu>.
  • widget <mem>.
  • widget <net>.
• src, i.e. main: Drive the whole system.