Break down `dump_verbose_config` function into "worker" functions that
display information for specific categories:
- `core_tap_config` for Core tap info
- `homebrew_config` for Homebrew/brew info
- `homebrew_env_config` for environment-related information
- `host_software_config` for Host software
Also, factor out code related to Clang into `describe_clang` function,
so that we can do:
```
f.puts "Clang: #{describe_clang}"
```
Library
This directory contains all the code run by the official brew and brew cask commands in Homebrew and all formulae (package descriptions) in taps (repositories containing formulae) in Taps subdirectories.