add typst support

[lean depot]

some users think that it's easier to use
IMHO we can provide another bot, so that users have the freedom to choose
here's my guide for deploying typst-bot on a remote virtual machine:
https://github.com/VincentTam/typst-bot/wiki/Deploy-your-own-typst-bot/

[robust pewter]

This looks incredibly ugly, why would we?

Like, I genuinely would just rather type $S_1 \cup S_2 \cup S_3 \cup S_4$

[magic vine]

John Math

[oak jetty]

man latex is easier

[lean depot]

Recursion in LaTeX

We have to think about expansion, which is not related to core program logic.

\newcommand\unions[2]{
  \ifnum#1>1 \expandafter\unions\expandafter{\number\numexpr#1-1\relax}{#2} \cup {#2}_{#1}
  \else
    {#2}_1
  \fi
}
$\unions{4}{S}$

Array mapping in typst

If you're comfortable with array mapping and anonymous functions, typst can provide a more concise typst-like syntax.

#let mystr = (n, s) => range(1, n+1).map(k => $#s _#k$).join($union$)
$#mystr(4, $S$)$

[magic vine]

vin100

[oak jetty]

my I am frankly not

gotta learn what it provids and how it fumctions

[lean depot]

using CJK characters and emoji for @magic vine input isn't convenient
the TeXit model is inefficient, cuz the setup is more troublesome (on both sides), and the usage is more complicated and error-prone

1. user needs to add the right package to the ,preamble
2. a TeXit's staff member needs to approve it manually
3. user needs a special environment to input CJK characters

with typst, we don't need additional setup on users' side. they can directly use those special characters for bot's input (without additional setup/syntax)

the above transferred message is sm1 (who, I think, knows LaTeX basics well, but NOT the tricky LaTeX package config)
with typst, he'd be able get things right without having to look for additional LaTeX packages

[silk haven]

Or just... have people not use Chinese symbols when LaTeXing

[lean depot]

The syntax is quite easy and intuitive, and it stretches the wrappers automatically, so there's no need to type stuff like \left(, and users can use text in math mode by double quotes instead of \text{} in LaTeX
so that would be much easier, especially for new learners
apart from that, an important reason would be the fact that @magic vine isn't always up 24/7

[stiff wyvern]

People like typst

Why shouldn't we?

[stiff wyvern]

@lean depot found a reason; we need to host the bot ourselves

We can try it but that'd possibly not work

[lean depot]

if you need any help, please don't hesitate to ask me for help

[stiff wyvern]

It's mostly a matter of how resource consuming it'd be

I'd argue the benefit of adding it is mostly convenience for typst users

[lean depot]

I'm hosting it on a Google Cloud Platform e2 VM (the cheapest VM), with minimum RAM & CPU possible, and it's responding quickly

[robust pewter]

Bloat, it'll be like 1.3 people using it every once in a while because everyone is just used to a more convinient alternative: LaTeX

Bloat
I think that's a thing that matters, I remember someone scolded us for having too many pointless bots

Theoretically, we could add it and see how frequently it is used and then if we actually do care about bot amount remove it if it is useless

But I'd save time by not adding it in the first place