feat: allow trailing zeros & only specifying decimal component when using string.numeric.parse

[TizzySaurus]

What

Add support for trailing zeros when using string.numeric.parse, such that e.g. type("string.numeric.parse")("3.00") and type("string.numeric.parse")(".5") works.

Why

Stemmed from conversation with @ssalbdivad on Discord here.

How

Add new numericStringMatcher regex, which has the same restrictions as the pre-existing wellFormedNumberMatcher bar the trailing zeros, and update the string.numeric.parse keyword to use it instead of wellFormedNumberMatcher.

Here's the regex change to allow trailing zeros:

- /^(?!^-0$)-?(?:0|[1-9]\d*)(?:\.\d*[1-9])?$/
+ /^(?!^-0$)-?(?:0|[1-9]\d*)(?:\.\d+)?$/

Test

pnpm i && pnpm build && node

then within the node repl:

const { type } = await import("arktype");
type("string.numeric.parse")("3.00") // doesn't return ArkErrors like it used to before this PR;

[ssalbdivad]

Definitely a QOL improvement, thanks so much 🎉