Adding to the toml-test-matrix

[arp242]

I've been working on a TOML test matrix, I'd also like to add this parser, but I need a few small programs for this – this should be very easy, but the last time I used Rust was well before 1.0, and it's not the easiest language to "trial and error" some things together, so it's kinda difficult to create myself 😅

What I would need are:

1. a toml-decoder and toml-encoder binary which read from stdin, as described in the toml-test README. This is already implemented as the test harnass, just not as a separate binary which reads from stdin.

2. A simpler binary which just decodes the file from argv[1] and prints how long this took to stdout (excluding reading the file) – this is used for the benchmark. In Python this is:

   import tomllib, sys, datetime
   
   with open(sys.argv[1], 'rb') as fp:
       data = fp.read().decode()
   start = datetime.datetime.now()
   tomllib.loads(data)
   print((datetime.datetime.now() - start).total_seconds())
   

Neither need to be in this repo as such, I can just add them to my toml-test-matrix repo and compile them from there – I don't mind if it's copy/pasted or ugly or whatever – it's only going to be run to create that HTML page.

It really shouldn't be some selective copy/pasting from https://github.com/toml-rs/toml/tree/main/crates/toml/tests and more than a few minutes or so of work – bit to do this myself I need to spend a few hours or days learning the basics of Rust.

[arp242]

Resolved via arp242/toml-test-matrix#1