[SAOC 2023] dfmt rewrite - Weekly update #17

[Prajwal S N]

Hi all,

This update marks the end of SAOC 2023. Across the course of this 
program, I worked on building a formatter akin to dfmt using the 
DMD frontend, and I must say I'm quite satisfied with the 
outcome. We've mostly managed to reproduce the original source 
code, formatted in a consistent manner. There are a few bugs in 
the implementation, and support for retaining comments is a work 
in progress (with a PR up in DMD too), but overall I would say 
the project has achieved what was intended - to design and 
implement a formatter which uses the same source of truth as the 
compiler in terms of language syntax and semantics.

Going forward, I'll be working on sorting out the smaller details 
and hopefully have dmdfmt integrated into the default set of 
packages for D soon. A big shoutout to everyone who supported me 
along the way - notably Razvan Nitu (my mentor), and also Jan 
Juritza, Max Haughton, and Andrew Cattermole.

I hope to share the finished project here soon, and until then, 
cheerio!