the command is actually fairly useless on windows anyway -- unless you are specifically running emacs with elevated privileges, you get the following error:
```
This will download and install fonts, are you sure you want to do this? (y or n) y
Contacting host: raw.githubusercontent.com:443
mm-write-region: Opening output file: Permission denied, c:/Windows/Fonts/material-design-icons.ttf
```
Highlights:
- 'doom purge' now purges builds, elpa packages, and repos by default.
Regrafting repos is now opt-in with the -g/--regraft switches.
Negation flags have been added for elpa/repos: -e/--no-elpa and
-r/--no-repos.
- Removed 'doom rebuild' (it is now just 'doom build' or 'doom b').
- Removed 'doom build's -f flag, this is now the default. Added the -r
flag instead, which only builds packages that need rebuilding.
- 'doom update' now updates packages synchronously, but produces more
informative output about the updating process.
- Straight can now prompt in batch mode, which resolves a lot of issues
with 'doom update' (and 'doom upgrade') freezing indefinitely or
throwing repo branch errors.
- 'bin/doom's switches are now positional. Switches aimed at `bin/doom`
must precede any subcommands. e.g.
Do: 'doom -yd upgrade'
Don't do: 'doom upgrade -yd'
- Moved 'doom doctor' from bin/doom-doctor to core/cli/doctor, and
integrated core/doctor.el into it, as to avoid naming conflicts
between it and Emacs doctor.
- The defcli! macro now has a special syntax for declaring flags, their
arguments and descriptions.
Addresses #1981, #1925, #1816, #1721, #1322
